Transportation Air Pollution
Air Pollution – Sources
Internal Combustion Engine
Pollutants
Photochemical Smog
Ozone
Acid Rain
Acid Rain
The Environmental Protection Agency
1955, 1963, 1970, 1990
Clean Air Acts
Clean Air Act of 1990
National Ambient Air Quality Standards (NAAQS)
Air Quality Standards
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
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)
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 But, Ozone problems persist. Acid rain problems persist. NOx emission from autos is a major contributor to these problems Transportation produces 25% of GHG emissions