{"id":43675,"date":"2026-09-07T20:10:43","date_gmt":"2026-09-07T19:10:43","guid":{"rendered":"https:\/\/greencitysolutions.de\/?p=43675"},"modified":"2026-10-13T00:30:19","modified_gmt":"2026-10-12T23:30:19","slug":"more-than-six-years-of-sustainable-collaboration","status":"publish","type":"post","link":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/","title":{"rendered":"More Than Six Years of Sustainable Collaboration"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-three\"><h3 class=\"fusion-title-heading title-heading-center fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:30;line-height:1;\"><p style=\"text-align: center;\"><strong>CityTree Refurbished and Relocated<\/strong><\/p><\/h3><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:40px;width:100%;\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-justify-content-space-around fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:2.88%;--awb-width-medium:66.666666666667%;--awb-order-medium:0;--awb-spacing-right-medium:2.88%;--awb-spacing-left-medium:2.88%;--awb-width-small:66.666666666667%;--awb-order-small:0;--awb-spacing-right-small:2.88%;--awb-spacing-left-small:2.88%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\" style=\"--awb-text-transform:none;\"><p>To mark the sixth anniversary of the CityTree\u2019s installation in front of <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\" target=\"_blank\" rel=\"noopener\"><strong><em>Deutsche Telekom&#8217;s headquarters in Bonn<\/em><\/strong><\/a>, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.<\/p>\n<blockquote>\n<p><em>&#8220;In line with our commitment to sustainability, our products are designed to be maintained and repaired with minimal effort&#8221;, says Peter S\u00e4nger, Managing Director of Green City Solutions. <\/em>He adds: <em>&#8220;We are aiming for a service life of at least 15 years \u2013 a goal that, based on the experience of the past six years of collaboration, is absolutely realistic.&#8221;<\/em><\/p>\n<\/blockquote>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-liftup-border-radius:0px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><div class=\"awb-image-frame awb-image-frame-1 imageframe-liftup\"><span class=\" fusion-imageframe imageframe-none imageframe-1\"><img decoding=\"async\" width=\"1024\" height=\"768\" title=\"k_GCS_CT Bonn Telekom 2_2026\" src=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1024x768.jpg\" alt class=\"img-responsive wp-image-44260\" srcset=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-200x150.jpg 200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-400x300.jpg 400w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-600x450.jpg 600w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-800x600.jpg 800w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1200x900.jpg 1200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026.jpg 1866w\" sizes=\"1200px\" \/><\/span><\/div><\/div><div class=\"fusion-text fusion-text-2\" style=\"--awb-content-alignment:center;--awb-font-size:10px;--awb-text-transform:none;\"><p style=\"text-align: center;\">Photo: GCS<\/p>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-text fusion-text-3\" style=\"--awb-text-transform:none;\"><h4><strong>A Joint Journey Since 2020<\/strong><\/h4>\n<p>From the outset, when the project was first installed in early June 2020, it was clear that the Bonn project was more than a one-off measure. At the time, we wrote that the CityTree stood <a href=\"https:\/\/greencitysolutions.de\/en\/telekom-hq\/\" target=\"_blank\" rel=\"noopener\">&#8220;not only for another step towards the smart city of the future, but also for the beginning of a successful partnership&#8221;<\/a>. Around the anniversary in June, it is <strong>clear<\/strong> \u2013 and <strong>tangible<\/strong> in the form of fresh air \u2013 how strong and long-lasting this partnership has become.<\/p>\n<p>The fact that this project is rooted in Bonn is particularly fitting: Deutsche Telekom itself refers to the city as its <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\/bonn\/telekom-engagement-fuer-bonn-480440\" target=\"_blank\" rel=\"noopener\"><strong>&#8220;home&#8221; and thereby underlines its long-term commitment to the region<\/strong><\/a>. With <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\/bonn\/telekom-engagement-fuer-bonn-480440\" target=\"_blank\" rel=\"noopener\">&#8220;more than 12,000 people from Bonn and the surrounding region&#8221;<\/a>, working <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\/bonn\/telekom-engagement-fuer-bonn-480440\" target=\"_blank\" rel=\"noopener\">&#8220;for Deutsche Telekom in the former capital&#8221;<\/a> and as <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\/bonn\/telekom-engagement-fuer-bonn-480440\" target=\"_blank\" rel=\"noopener\">&#8220;Bonn\u2019s largest and most important employer&#8221;<\/a>, Deutsche Telekom has <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\/bonn\/telekom-engagement-fuer-bonn-480440\" target=\"_blank\" rel=\"noopener\"><strong>&#8220;a major social responsibility&#8221;<\/strong><\/a> that the <a href=\"https:\/\/www.telekom.com\/de\/konzern\/themenspecials\/bonn\/bonn\/telekom-engagement-fuer-bonn-480440\" target=\"_blank\" rel=\"noopener\">&#8220;Group actively fulfils&#8221;<\/a>.<\/p>\n<\/div><div class=\"fusion-text fusion-text-4\" style=\"--awb-text-transform:none;\"><h4><strong>Sustainability with Measurable Impact<\/strong><\/h4>\n<p>Sustainability is reflected not only in the CityTree\u2019s long service life, but also in its demonstrable environmental impact. According to the current performance report, the biofilter processed around 62.6 million cubic metres of air between April 2022 and July 2026. This corresponds to the volume of air breathed by more than 36,800 people. At the same time, 622 grams of particulate matter (PM2.5) were captured \u2013 equivalent to the particulate matter contained in more than 34,000 cigarettes.<br \/>\nIn 2026, the average cooling effect on the surrounding air was 3.9 K (\u00b0C). During hot summer days in the middle of the heatwave, temperature differences of up to 10.6 K (\u00b0C) were recorded \u2013 a cooling effect comparable to that of 81 trees.<\/p>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"awb-gallery-wrapper awb-gallery-wrapper-1 button-span-no\" style=\"--more-btn-alignment:center;\"><div style=\"margin:-5px;--awb-aspect-ratio:2 \/ 3;--awb-bordersize:0px;\" class=\"fusion-gallery fusion-gallery-container fusion-grid-2 fusion-columns-total-2 fusion-gallery-layout-grid fusion-gallery-1 has-aspect-ratio\"><div style=\"padding:5px;\" class=\"fusion-grid-column fusion-gallery-column fusion-gallery-column-2\"><div class=\"fusion-gallery-image fusion-gallery-image-liftup\"><a href=\"https:\/\/www.linkedin.com\/posts\/weltumwelttag-klimaschutz-nachhaltigkeit-ugcPost-7467967849941237760-PjhJ\/%20\" rel=\"noreferrer\" data-rel=\"iLightbox[gallery_image_1]\" class=\"fusion-lightbox\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026.jpg\" width=\"1512\" height=\"2016\" alt=\"\" title=\"k_GCS_CT Bonn Telekom 3_2026\" aria-label=\"k_GCS_CT Bonn Telekom 3_2026\" class=\"img-responsive wp-image-44262\" srcset=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026-200x267.jpg 200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026-400x533.jpg 400w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026-600x800.jpg 600w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026-800x1067.jpg 800w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026-1200x1600.jpg 1200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-3_2026.jpg 1512w\" sizes=\"(min-width: 2200px) 100vw, (min-width: 772px) 638px, (min-width: 640px) 772px, \" \/><\/a><\/div><\/div><div style=\"padding:5px;\" class=\"fusion-grid-column fusion-gallery-column fusion-gallery-column-2\"><div class=\"fusion-gallery-image fusion-gallery-image-liftup\"><a href=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026.jpg\" rel=\"noreferrer\" data-rel=\"iLightbox[gallery_image_1]\" class=\"fusion-lightbox\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026.jpg\" width=\"1392\" height=\"1856\" alt=\"\" title=\"k_GCS_CT Bonn Telekom 4_2026\" aria-label=\"k_GCS_CT Bonn Telekom 4_2026\" class=\"img-responsive wp-image-44263\" srcset=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026-200x267.jpg 200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026-400x533.jpg 400w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026-600x800.jpg 600w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026-800x1067.jpg 800w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026-1200x1600.jpg 1200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-4_2026.jpg 1392w\" sizes=\"(min-width: 2200px) 100vw, (min-width: 772px) 638px, (min-width: 640px) 772px, \" \/><\/a><\/div><\/div><div class=\"clearfix\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-5\" style=\"--awb-content-alignment:center;--awb-font-size:10px;--awb-text-transform:none;\"><p style=\"text-align: center;\">Photos: GCS<\/p>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-text fusion-text-6\" style=\"--awb-text-transform:none;\"><h4><strong>Sustainability \u2013 and Rethinking What Already Exists<\/strong><\/h4>\n<p>Every project comes &#8220;with a carbon footprint&#8221;. Peter S\u00e4nger explains: &#8220;With more than 110 products installed by now, it is all the more important to ensure that these products make the greatest possible contribution to climate adaptation through their positive environmental impact, thereby turning their carbon balance negative&#8221;.<\/p>\n<p>That is precisely what the <a href=\"https:\/\/greencitysolutions.de\/en\/citytree\/\" target=\"_blank\" rel=\"noopener\"><strong><em>CityTree<\/em><\/strong><\/a> stands for: It combines the outstanding natural capabilities of moss with innovative technology to demonstrably improve air quality and provide fresh, healthy air in highly polluted urban spaces.<\/p>\n<\/div><div class=\"fusion-text fusion-text-7\" style=\"--awb-text-transform:none;\"><h4><strong>Bonn as a Symbol of Smart, Healthy Cities<\/strong><\/h4>\n<p>Back in 2020, the <a href=\"https:\/\/ga.de\/bonn\/stadt-bonn\/citytree-bundesweit-erstmals-vor-der-telekom-zentrale-in-bonn-aufgestellt_aid-51399743\" target=\"_blank\" rel=\"noopener\"><strong><em>General-Anzeiger Bonn<\/em><\/strong><\/a> described the location as the<strong> first project of its kind in Germany<\/strong> to be installed in front of Deutsche Telekom\u2019s headquarters. The <a href=\"https:\/\/www.youtube.com\/watch?v=MMgUqtG4ppE\" target=\"_blank\" rel=\"noopener\"><strong><em>video documenting the installation<\/em><\/strong><\/a> at the time also demonstrated how Green City Solutions and Deutsche Telekom are combining nature and digitalisation to create a more liveable urban microclimate. This was also highlighted by Gabriele Kotulla-M\u00fcnster, then a member of Deutsche Telekom\u2019s Smart City Unit, and Peter S\u00e4nger, CEO and co-founder of Green City Solutions.<\/p>\n<p>With the CityTree\u2019s return in spring 2026, the partnership in Bonn is once again sending a strong signal: for <strong>sustainable urban development<\/strong>, for <strong>smarte green infrastructure<\/strong> and <strong>collaboration with a lasting impact<\/strong>.<\/p>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-liftup-border-radius:0px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><div class=\"awb-image-frame awb-image-frame-2 imageframe-liftup\" style=\"max-width:400px;\"><span class=\" fusion-imageframe imageframe-none imageframe-2\"><img decoding=\"async\" width=\"768\" height=\"1024\" title=\"k_GCS_CT Bonn Telekom 5_2026\" src=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026-768x1024.jpg\" alt class=\"img-responsive wp-image-44261\" srcset=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026-200x267.jpg 200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026-400x533.jpg 400w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026-600x800.jpg 600w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026-800x1066.jpg 800w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026-1200x1600.jpg 1200w, https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-5_2026.jpg 1384w\" sizes=\"1200px\" \/><\/span><\/div><\/div><div class=\"fusion-text fusion-text-8\" style=\"--awb-content-alignment:center;--awb-font-size:10px;--awb-text-transform:none;\"><p style=\"text-align: center;\">Photo: GCS<\/p>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-text fusion-text-9\" style=\"--awb-text-transform:none;\"><p>Would you also like to bring fresh air to your city, shopping destination or business premises?<\/p>\n<\/div><div style=\"text-align:center;\"><a class=\"fusion-button button-flat button-small button-default fusion-button-default button-1 fusion-button-default-span fusion-button-default-type\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"mailto:sales@mygcs.de%20\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">Let\u2019s plan your project together!<\/span><\/a><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:30px;margin-bottom:10px;width:100%;\"><\/div><div class=\"fusion-content-boxes content-boxes columns row fusion-columns-1 fusion-columns-total-1 fusion-content-boxes-1 content-boxes-icon-with-title content-left\" style=\"--awb-hover-accent-color:var(--awb-color8);--awb-circle-hover-accent-color:var(--awb-color8);--awb-item-margin-bottom:40px;\" data-animationOffset=\"top-into-view\"><div style=\"--awb-backgroundcolor:rgba(255,255,255,0);\" class=\"fusion-column content-box-column content-box-column content-box-column-1 col-lg-12 col-md-12 col-sm-12 fusion-content-box-hover content-box-column-last content-box-column-last-in-row\"><div class=\"col content-box-wrapper content-wrapper link-area-link-icon icon-hover-animation-none\" data-animationOffset=\"top-into-view\"><div class=\"fusion-clearfix\"><\/div><div class=\"content-container\">Published on 7. September 2026<\/div><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:3.84%;--awb-width-medium:50%;--awb-order-medium:0;--awb-spacing-right-medium:3.84%;--awb-spacing-left-medium:3.84%;--awb-width-small:50%;--awb-order-small:0;--awb-spacing-right-small:3.84%;--awb-spacing-left-small:3.84%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:100px;width:100%;\"><\/div><div style=\"text-align:center;\"><a class=\"fusion-button button-flat fusion-button-default-size button-custom fusion-button-default button-2 fusion-button-default-span fusion-button-default-type\" style=\"--button_accent_color:#1e5546;--button_accent_hover_color:#cde6cd;--button_border_hover_color:#cde6cd;--button_gradient_top_color:rgba(84,84,84,0);--button_gradient_bottom_color:rgba(84,84,84,0);--button_gradient_top_color_hover:rgba(216,216,216,0);--button_gradient_bottom_color_hover:rgba(216,216,216,0);--button_text_transform:uppercase;\" target=\"_self\" href=\"https:\/\/greencitysolutions.de\/en\/latest-news\/\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">&lt;&lt; BACK TO OVERVIEW<\/span><\/a><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:100px;width:100%;\"><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":26,"featured_media":43683,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110,78,70],"tags":[],"class_list":["post-43675","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecobreeze-citytree_en","category-news","category-projects"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>More Than Six Years of Sustainable Collaboration - Green City Solutions<\/title>\n<meta name=\"description\" content=\"To mark the sixth anniversary of the CityTree\u2019s installation in front of Deutsche Telekom\u2019s headquarters in Bonn, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"More Than Six Years of Sustainable Collaboration - Green City Solutions\" \/>\n<meta property=\"og:description\" content=\"To mark the sixth anniversary of the CityTree\u2019s installation in front of Deutsche Telekom\u2019s headquarters in Bonn, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/\" \/>\n<meta property=\"og:site_name\" content=\"Green City Solutions\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mygcs\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-07T19:10:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-12T23:30:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1866\" \/>\n\t<meta property=\"og:image:height\" content=\"1050\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Tina Hensel\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@mycitytree\" \/>\n<meta name=\"twitter:site\" content=\"@mycitytree\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Tina Hensel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/\"},\"author\":{\"name\":\"Tina Hensel\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#\\\/schema\\\/person\\\/c1a7a7d249c01327822796a8103e0118\"},\"headline\":\"More Than Six Years of Sustainable Collaboration\",\"datePublished\":\"2026-09-07T19:10:43+00:00\",\"dateModified\":\"2026-10-12T23:30:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/\"},\"wordCount\":4081,\"publisher\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/greencitysolutions.de\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg\",\"articleSection\":[\"EcoBreeze | CityTree EN\",\"News\",\"Projects\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/\",\"url\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/\",\"name\":\"More Than Six Years of Sustainable Collaboration - Green City Solutions\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/greencitysolutions.de\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg\",\"datePublished\":\"2026-09-07T19:10:43+00:00\",\"dateModified\":\"2026-10-12T23:30:19+00:00\",\"description\":\"To mark the sixth anniversary of the CityTree\u2019s installation in front of Deutsche Telekom\u2019s headquarters in Bonn, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/more-than-six-years-of-sustainable-collaboration\\\/#primaryimage\",\"url\":\"https:\\\/\\\/greencitysolutions.de\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg\",\"contentUrl\":\"https:\\\/\\\/greencitysolutions.de\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg\",\"width\":1866,\"height\":1050},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/\",\"name\":\"Green City Solutions\",\"description\":\"We grow fresh air\",\"publisher\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#organization\",\"name\":\"Green City Solutions\",\"url\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/greencitysolutions.de\\\/wp-content\\\/uploads\\\/2023\\\/11\\\/GCS_Logo_Forestgreen.png\",\"contentUrl\":\"https:\\\/\\\/greencitysolutions.de\\\/wp-content\\\/uploads\\\/2023\\\/11\\\/GCS_Logo_Forestgreen.png\",\"width\":1521,\"height\":903,\"caption\":\"Green City Solutions\"},\"image\":{\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/mygcs\",\"https:\\\/\\\/x.com\\\/mycitytree\",\"https:\\\/\\\/www.instagram.com\\\/green_city_solutions\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/greencitysolutions\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UC2lCPB5t5TuN8QL1egOBkNg\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/#\\\/schema\\\/person\\\/c1a7a7d249c01327822796a8103e0118\",\"name\":\"Tina Hensel\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e8c0c71b5ec2fcb69cc8d0cca4be47bb70c54425f7d672f6b79148614ba5535a?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e8c0c71b5ec2fcb69cc8d0cca4be47bb70c54425f7d672f6b79148614ba5535a?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e8c0c71b5ec2fcb69cc8d0cca4be47bb70c54425f7d672f6b79148614ba5535a?s=96&d=mm&r=g\",\"caption\":\"Tina Hensel\"},\"url\":\"https:\\\/\\\/greencitysolutions.de\\\/en\\\/author\\\/tina\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"More Than Six Years of Sustainable Collaboration - Green City Solutions","description":"To mark the sixth anniversary of the CityTree\u2019s installation in front of Deutsche Telekom\u2019s headquarters in Bonn, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/","og_locale":"en_US","og_type":"article","og_title":"More Than Six Years of Sustainable Collaboration - Green City Solutions","og_description":"To mark the sixth anniversary of the CityTree\u2019s installation in front of Deutsche Telekom\u2019s headquarters in Bonn, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.","og_url":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/","og_site_name":"Green City Solutions","article_publisher":"https:\/\/www.facebook.com\/mygcs","article_published_time":"2026-09-07T19:10:43+00:00","article_modified_time":"2026-10-12T23:30:19+00:00","og_image":[{"width":1866,"height":1050,"url":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg","type":"image\/jpeg"}],"author":"Tina Hensel","twitter_card":"summary_large_image","twitter_creator":"@mycitytree","twitter_site":"@mycitytree","twitter_misc":{"Written by":"Tina Hensel","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/#article","isPartOf":{"@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/"},"author":{"name":"Tina Hensel","@id":"https:\/\/greencitysolutions.de\/en\/#\/schema\/person\/c1a7a7d249c01327822796a8103e0118"},"headline":"More Than Six Years of Sustainable Collaboration","datePublished":"2026-09-07T19:10:43+00:00","dateModified":"2026-10-12T23:30:19+00:00","mainEntityOfPage":{"@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/"},"wordCount":4081,"publisher":{"@id":"https:\/\/greencitysolutions.de\/en\/#organization"},"image":{"@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/#primaryimage"},"thumbnailUrl":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg","articleSection":["EcoBreeze | CityTree EN","News","Projects"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/","url":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/","name":"More Than Six Years of Sustainable Collaboration - Green City Solutions","isPartOf":{"@id":"https:\/\/greencitysolutions.de\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/#primaryimage"},"image":{"@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/#primaryimage"},"thumbnailUrl":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg","datePublished":"2026-09-07T19:10:43+00:00","dateModified":"2026-10-12T23:30:19+00:00","description":"To mark the sixth anniversary of the CityTree\u2019s installation in front of Deutsche Telekom\u2019s headquarters in Bonn, the air filter has undergone a refurbishment to ensure that it can continue serving its purpose for many years to come.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/greencitysolutions.de\/en\/more-than-six-years-of-sustainable-collaboration\/#primaryimage","url":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg","contentUrl":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2026\/06\/k_GCS_CT-Bonn-Telekom-2_2026-1-e1781565635402.jpg","width":1866,"height":1050},{"@type":"WebSite","@id":"https:\/\/greencitysolutions.de\/en\/#website","url":"https:\/\/greencitysolutions.de\/en\/","name":"Green City Solutions","description":"We grow fresh air","publisher":{"@id":"https:\/\/greencitysolutions.de\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/greencitysolutions.de\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/greencitysolutions.de\/en\/#organization","name":"Green City Solutions","url":"https:\/\/greencitysolutions.de\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/greencitysolutions.de\/en\/#\/schema\/logo\/image\/","url":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2023\/11\/GCS_Logo_Forestgreen.png","contentUrl":"https:\/\/greencitysolutions.de\/wp-content\/uploads\/2023\/11\/GCS_Logo_Forestgreen.png","width":1521,"height":903,"caption":"Green City Solutions"},"image":{"@id":"https:\/\/greencitysolutions.de\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/mygcs","https:\/\/x.com\/mycitytree","https:\/\/www.instagram.com\/green_city_solutions\/","https:\/\/www.linkedin.com\/company\/greencitysolutions","https:\/\/www.youtube.com\/channel\/UC2lCPB5t5TuN8QL1egOBkNg"]},{"@type":"Person","@id":"https:\/\/greencitysolutions.de\/en\/#\/schema\/person\/c1a7a7d249c01327822796a8103e0118","name":"Tina Hensel","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/e8c0c71b5ec2fcb69cc8d0cca4be47bb70c54425f7d672f6b79148614ba5535a?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/e8c0c71b5ec2fcb69cc8d0cca4be47bb70c54425f7d672f6b79148614ba5535a?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e8c0c71b5ec2fcb69cc8d0cca4be47bb70c54425f7d672f6b79148614ba5535a?s=96&d=mm&r=g","caption":"Tina Hensel"},"url":"https:\/\/greencitysolutions.de\/en\/author\/tina\/"}]}},"_links":{"self":[{"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/posts\/43675","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/comments?post=43675"}],"version-history":[{"count":5,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/posts\/43675\/revisions"}],"predecessor-version":[{"id":44269,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/posts\/43675\/revisions\/44269"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/media\/43683"}],"wp:attachment":[{"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/media?parent=43675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/categories?post=43675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/greencitysolutions.de\/en\/wp-json\/wp\/v2\/tags?post=43675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}