This document discusses various types of atmospheric pollution. It defines air pollution as the presence of any harmful gases in the atmosphere. It describes acid rain as occurring when carbon dioxide mixes with water vapor to form carbonic acid, and explains that increased CO2 levels lead to more intense acid rain, which can harm health. The document also notes that greenhouse gases like carbon dioxide and methane regulate temperature by trapping heat, and that global warming is defined as the increase in the average temperature near Earth's surface, which is caused by factors like increased CO2, methane, vehicles, industry, deforestation, and population growth. Finally, it states that ozone depletion is caused by CFCs released from sprays and paints, leading