Air Quality is improving in much of the US

From: Roger Greenway, ENN
Published March 18, 2010 08:00 AM

Do they really work to improve the quality of our air and water? Are they worth their cost in terms of regulatory  burden and costs of compliance? In short, yes! To some extent, our regulatory programs are a trial and error  affair. We can’t always know theultimate effectiveness of a new program nor its ultimate costs. We can’t always  predict the economic benefits of new regulations either since they invariably lead to innovation and generate  new inventions and jobs.

The US has been monitoring the quality of our air and water for decades, so we can track the effectiveness of our programs. The U.S. Environmental Protection Agency (EPA) is making the most recent data available. Air pollutionimpacts public health, the environment, and the Earth’s climate, and understanding these impacts are important priorities for the agency.

EPA regulatory actions and voluntary efforts have led to cleaner cars, industries and consumer products, that in turn have contributed to improvements in the nation’s air. They have also led to developments of new pollution control systems for power plants and other major sources such as Selective Catalytic Reduction, a technology that removes Nitrogen Oxides from emissions by converting it to Nitrogen and water.

 Since 1990, nationwide air quality has improved significantly for the six common air pollutants: ground-level  ozone, particle pollution, lead, nitrogen dioxide, carbon monoxide, and sulfur dioxide. Emissions of toxic air    pollutants, such as benzene, have declined about 40 percent nationwide between 1990 and 2005.

  These reductions are helping to improve public health by decreasing the number of emergency room visits,    respiratory illnesses, and premature deaths. Positive impacts can also be seen in the environment, with regional

haze decreasing.

Despite this progress, about 127 million Americans live in counties violating at least one of the national air quality standards. The agency has taken recent actions to tighten air quality standards to help ensure improvements in air quality for everyone.

EPA’s most recent evaluation of air pollution, Our Nation’s Air, Status and Trends Through 2008, presents trends in air quality measurements, analyzes national emissions from key industrial sectors and takes a look at the relationship between air quality and climate change.

More information: http://www.epa.gov/airtrends

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