Air pollution refers to contamination of the air indoors or outdoors by harmful gases, dust, or smoke. It occurs when substances enter the atmosphere and make it difficult for plants, animals, and humans to survive by making the air dirty. Major causes of air pollution include burning fossil fuels for energy and transportation, agricultural activities, exhaust from factories and industries, and mining operations. The effects of air pollution are severe and include respiratory and heart problems, global warming, acid rain, eutrophication of water bodies, and damage to wildlife. Urgent action is needed to control air pollution and mitigate its harmful impacts.