The document discusses the harmful effects of air pollution on both human health and the environment. It states that according to the World Health Organization, 7 million people die prematurely each year from illnesses caused by air pollution, which increases risks of heart and lung diseases. Air pollution damages the lungs and blood and can cause respiratory infections. The document also explains how air pollution contributes to climate change and harms ecosystems, plants, crops, and wildlife. It argues that fighting air pollution requires coordinated efforts from governments, organizations, and individuals around the world.