1. Acid rains are produced by a)excess NO, and SO, from burning fossil fuels b)excess production of NH, by industry and coal gas (c) excess release of carbon monoxide by incomplete combustion (d)...

1. Acid rains are produced by

a)excess NO, and SO, from burning fossil fuels

b)excess production of NH, by industry and coal gas

(c) excess release of carbon monoxide by incomplete combustion

(d) excess formation of CO₂ by combustion and animal respiration. (1988, 89)