"Since the 1990s, SO2 emissions have dropped 40%, and according to the Pacific Research Institute, acid rain levels have dropped 65% since 1976."<quoted text>
If sulfur dioxide was so bad, they why have not ten of thousands of people who lived near paper mills and petroleum refineries die off?!? By the way, 90% of sulfur dioxide is made by nature mostly from volcanic activity and wild fires. And lightning make most of the oxides of nitrogen. Soooo, let's cap off all the volcanoes and blow up thunderstorms with nukes!!!
"The principal cause of acid rain is sulfur and nitrogen compounds from human sources, such as electricity generation, factories, and motor vehicles."