So, the quick, fast, cheap fix is to put the SO2 out through tall stacks.

FORBES: Climategate II: An Open Letter to the Director of the National Center for Atmospheric Research

Unlike SO2, CO2 wasn't a pollutant--at least not then--and the EPA had no authority to regulate it.

FORBES: Magazine Article

The economic value of the health impacts was based on premature mortality, workdays lost, and other direct costs to the healthcare system resulting from emissions of PM2.5, NOx, and SO2.

FORBES: How Much Do Health Impacts From Fossil Fuel Electricity Cost The U.S. Economy?

Enron had become a big SO2 market cap-and-trade player.

FORBES: Lisa Jackson serves U.S. industry a Thanksgiving turkey.

Media-fueled alarm about acid rain provided a basis for legislation to create markets for buying and selling excess sulfur dioxide (SO2) and nitrogen dioxide emission credits, and Project 88 became the Clean Air Act of 1990.

FORBES: Magazine Article

While I understand there are efforts to get much better inventories of CO2 emissions from these nations, when I asked a US EPA representative if their efforts were going to also inventory SO2 emissions (amount and height of emission), I was told they were not.

FORBES: Climategate II: An Open Letter to the Director of the National Center for Atmospheric Research