The Acid Rain Experience: Should We Be Concerned about SO 2 Emissions Hotspots?. Emissions Marketing Association Annual Spring Meeting Amy Kinner, Rona Birnbaum May 4, 2004. What Are the Benefits of a Cap and Trade Approach?.
Emissions Marketing Association Annual Spring Meeting
Amy Kinner, Rona Birnbaum
May 4, 2004
Total Annual SO2 Emissions From Acid Rain Sources (1980-2002)
Total annual emissions from Acid Rain sources were reduced by an average of approximately 5 million tons between 1990 and Phase II (2000-2002).
Phase I average (1995 - 1999)
Phase II average (2000 - 2002)
Scale: 1990 emissions in Ohio were 2.2. million tonsState-Level SO2 Emissions Were Reduced in States with Highest 1990 Emissions
SO2 Emissions from Power Plants
The Acid Rain Program Reduced Emissions at Highest
Increases in SO2Emissions Occurred during the Acid
There are various ways we could identify sources that could potentially be of concern.
Air Quality/Environmental Effects
The Acid Rain Program accomplished its goal of reducing national SO2 emissions.
What happened at the local level?
SO2 Emissions Changes Between 1990 and 2000-02
(Acid Rain Sources)
* This only includes facilities with emissions in 1990. It does not include new sources or sources that did not operate in 1990.
Plant-Level 1990 SO2 Emissions and SO2 Emissions Changes by 2000-02
Are third quartile plants now a concern?
* Plants were ranked by 1990 emissions (1=lowest emissions, 627=highest emissions). Using these rankings, plants were divided into quartiles, with plants with the highest 25% of emissions in the fourth quartile and plants with the next highest 25% of emissions in the third quartile.
Regional Sulfate Concentrations Have Been Reduced of Plants that Increased and Plants that Decreased Emissions
Average Annual Sulfate
Average Annual Sulfate Concentrations
Source: Clean Air Status and Trends Network (CASTNET)
Has the Program Improved Air Quality Overall? of Plants that Increased and Plants that Decreased Emissions
Source: EPA, Latest Findings on Air Quality: 2002 Status and Trends Report. (August 2003)