7 causes of air pollution & what are the main air pollutants? Air pollution refers to the presence of harmful substances in the air, adversely affecting humans, animals, plants, and the environment. It poses significant health risks and contributes to environmental degradation on a global scale. Read more https://www.tumblr.com/bigcountryrecycling/755067389447634944/7-causes-of-air-pollution-what-are-the-main-air?source=share #environment #environmentalissue #climatechange #Recycle #Recycling #Air #Pollution #Pollutants #environmental #USA