Transportation Transportation Air PollutionAir Pollution

Air Pollution – SourcesAir Pollution – Sources

Internal Combustion EngineInternal Combustion Engine

PollutantsPollutants

Photochemical SmogPhotochemical Smog

OzoneOzone

Acid RainAcid Rain

Acid RainAcid Rain

The Environmental Protection The Environmental Protection AgencyAgency

Clean Air ActsClean Air Acts1955, 1963, 1970, 19901955, 1963, 1970, 1990

Clean Air Act of 1990Clean Air Act of 1990

Air Quality StandardsAir Quality StandardsNational Ambient Air Quality Standards National Ambient Air Quality Standards

(NAAQS)(NAAQS)

Attainment of NAAQSAttainment of NAAQS

1-hour Ozone Standard1-hour Ozone StandardWhere are the problem areas?Where are the problem areas?

How are emission standards How are emission standards achieved?achieved?

Catalytic ConverterCatalytic Converter

Command and Control Command and Control StrategyStrategy

Tailpipe Emissions Tailpipe Emissions TestingTesting

in Connecticutin Connecticut    

EPA Strategies Have Worked for EPA Strategies Have Worked for

Pollution Emission by cars.Pollution Emission by cars.

Even though vehicle miles Even though vehicle miles increased by 150%, emission have increased by 150%, emission have substantially decreased.substantially decreased.

Cars also emit CO2Cars also emit CO2

Justices Say E.P.A. Has Justices Say E.P.A. Has Power to Act on Harmful Power to Act on Harmful

Gases Gases (NYT April 3, 2007)(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.

ConclusionsConclusions

Clean Air Act has been very successfulClean 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 NOx emission from autos is a major

contributor to these problemscontributor to these problems Transportation produces 25% of GHG Transportation produces 25% of GHG

emissionsemissions