Transportation Air Pollution

Air Pollution – Sources

Internal Combustion Engine

Pollutants

Photochemical Smog

Ozone

Acid Rain

The Environmental Protection Agency

Clean Air Acts 1955, 1963, 1970, 1990

Clean Air Act of 1990

Air Quality Standards National Ambient Air Quality Standards (NAAQS)

Attainment of NAAQS

1-hour Ozone Standard Where are the problem areas?

How are emission standards achieved?

Catalytic Converter

Command and Control Strategy

Tailpipe Emissions Testing in Connecticut Tailpipe Emissions Testing in Connecticut

EPA Strategies Have Worked for Pollution Emission by cars. Even though vehicle miles increased by 150%, emission have substantially decreased.

Cars also emit CO2

Justices Say E.P.A. Has Power to Act on Harmful Gases (NYT April 3, 2007) Justices Say E.P.A. Has Power to Act on Harmful Gases (NYT April 3, 2007) WASHINGTON, April 2, 2007— In one of its most important environmental decisions in years, the Supreme Court ruled on Monday that the EPA has the authority to regulate heat-trapping gases in automobile emissions.

Conclusions Clean Air Act has been very successful Clean Air Act has been very successful But, Ozone problems persist. But, Ozone problems persist. Acid rain problems persist. Acid rain problems persist. NOx emission from autos is a major contributor to these problems NOx emission from autos is a major contributor to these problems Transportation produces 25% of GHG emissions Transportation produces 25% of GHG emissions