The existing US NOx cap-and-trade program lowered 2008 summertime NOx emissions from power plants and large industrial sources 62% compared to year 2000 levels and 75% lower than in 1990, according to a report released by the US Environmental Protection Agency (EPA).
|State level ozone emissions in the NBP, from 1990 to 2010 (projected). Source: EPA. Click to enlarge.|
Highlights of the 2008 NOx Budget Trading Program Annual Report, covering 20 eastern states and the District of Columbia, show that:
The reduction of NOx has helped reduce smog levels by 10 to 14% in the NBP (NOx Budget Trading Program) region—largely in the eastern parts of the country;
There is a strong association between areas with the greatest reductions in NOx emissions and downwind sites that show the greatest improvements in smog; and
The program contributed to improvements in air quality in 97% of nonattainment areas in the east, with 85% of these areas now below the smog standard.
The NOx Budget Trading Program is a partnership between federal and state governments to reduce the regional transport of NOx from power plants and industry in the eastern US. This market-based cap and trade program was created to cost-effectively reduce NOx emissions during the ozone season. This program provides facilities flexibility to choose their control options including installing control technologies, replacing existing controls with more advanced technologies, optimizing existing controls, and switching fuels. This flexibility and an active NOx allowance market have led to near perfect compliance since the start of the program in 2003.