Which of the following is an exergonic reaction? a. The conversion of one glucose molecule to two pyruvate molecules by glycolysis
b. The formation of ATP from ADP and Pi
c .The movement of a proton from the mitochondrial matrix to the intermembrane space
d. The transfer of electrons from O2 to NADH

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.