Polluted air, and especially the fine dust it contains, attacks all human organs, leading to everything from heart and lung problems to dementia, cancer and skin diseases. Regarding Covid-19 studies indicate a clear correlation between fine dust pollution and higher mortality rates of Covid-19. Cardiovascular or respiratory diseases caused by fine dust increase the risk of heavy Covid-19 diseases enormously. According to a comprehensive study by the Max Planck Institute air pollution could be a co-factor in 26 percent of Covid-19 deaths in Germany. Worldwide, they put the proportion at an average of 15 percent.