emissions

Diesel produces more smog than gasoline, study says

Diesel engines produce nearly 15 times the amount of one of the main ingredients in smog than gasoline-powered engines, says a recent study by the University of Cal-Berkeley. The study was in part funded by the U.S. Environmental Protection Agency and the California Air Resources Board, and, notably, the study concludes that "diesel exhaust is responsible for 65-90 percent" of a particular geographical region's vehicular-delivered secondary organic aerosol — the smog ingredient. For the full report of ...

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CARB ‘sends message’ with enforcement blitz

California's Air Resources Board throughout the month of August held a statewide inspection blitz in which it checked more than 4,000 trucks for compliance.

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Court upholds EPA’s greenhouse gas regulations

The U.S. Court of Appeals for the District of Columbia has dismissed challenges to recent Environmental Protection Agency greenhouse gas rules.

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