Definition: a theory of overall increase in world near-surface air and ocean temperatures which may be caused by additional heat being trapped by greenhouse gases. the increase of temperatures would cause significant changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.