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Study shows two-stroke scooters dominant source of air pollution in many cities; asymmetric polluters

Green Car Congress

A study by European researchers has found that two-stroke (2S) scooters, although constituting a small fraction of the fleet, can dominate urban vehicular pollution through organic aerosol and aromatic emission factors up to thousands of times higher than from other vehicle classes. —Platt et al.

Pollution 362
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Does The Tesla Model S Electric Car Pollute More Than An SUV?

Green Car Reports

Does the supposedly clean, green Tesla Model S really pollute more than a gas-guzzling Jeep Grand Cherokee sport-utility vehicle? In an exhaustive 6,500-word article on the financial website Seeking Alpha, analyst Nathan Weiss lays out a case that the Model S actually has higher effective emissions than most.'

Pollution 167
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Study finds that diesel school bus emission retrofits reduce tailpipe emissions, but dont do much for pollution in passenger cabin

Green Car Congress

A UCLA study of the performance of retrofit systems for diesel-powered school buses has found that while the systems significantly lowered tailpipe emissions, there was no unequivocal decrease for in-cabin air pollutants after retrofitting. Environmental Science & Technology Article ASAP doi: 10.1021/es201070t. —Zhang and Zhu.

Pollution 259
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HEI ACES study of lifetime animal exposure to New Technology Diesel Engine exhaust finds no lung cancer

Green Car Congress

The first study to conduct a comprehensive evaluation of lifetime exposure to new technology diesel exhaust (NTDE)—i.e., exhaust from heavy-duty diesel engines meeting EPA 2007 and later emissions requirements—has found no evidence of carcinogenic lung tumors. Earlier post.) Earlier post.)

Exhaust 150
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Study Finds Elevated Ultrafine Particle Pollution Levels Near Regional Airports

Green Car Congress

Air pollution may pose an important but largely overlooked health concern for people living near smaller regional airports, according to a new study published in the ACS journal Environmental Science & Technology. Aircraft exhaust includes pollutants linked to a variety of health problems. ” Resources.

Pollution 199
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U Toronto studies find traffic emissions spread farther than thought; 25% of cars causing 90% of pollution

Green Car Congress

A trio of recently published studies from a team of University of Toronto engineers has found that air pollution could be spreading up to three times farther than thought, contributing to varying levels of air quality across cities. We used to think that living near a major road meant that you lived near a lot of air pollution.

Pollution 150
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Study Measures Impact of Biodiesel on Non-Regulated Pollutants in Heavy-Duty Engine

Green Car Congress

A team from the US National Renewable Energy Laboratory and the Colorado School of Mines has measured gas phase and particle-associated non-regulated pollutant emissions from a heavy-duty engine operating both with and without a catalyzed DPF and operating on biodiesel fuel. Article ASAP doi: 10.1021/es1008032. Ratcliff, A.

Pollution 210