"The California Air Resources Board has adopted a measure developed with representatives of the electrical utilities that will limit and monitor the emissions of the greenhouse gas sulfur hexafluoride, SF6, from high-voltage electrical applications."

"Nearly a third of older-model cars stopped for roadside smog tests in Southern California failed them, despite having received a passing grade at inspection stations within a year, a state audit has found."

"The Teamsters union and environmental activists have formed an unlikely and outspoken alliance aiming to clear the air in American ports, and perhaps bolster the Teamsters’ ranks in the process."

"A fragrant personal care spray designed to make men appear to be free of unpleasant body odor has polluted California air to the degree that the state has fined the brandowner's corporate parent more than $1 million."

"A bipartisan group of senators has introduced a bill that would sidestep the stalled climate debate on carbon emissions and reduce other harmful gases by large margins in the next few years."

"Quebec’s tough new light vehicle emissions regulation has become a political hot potato in Canada after the federal environment minister, Jim Prentice, denounced the rule as 'counter-productive' last week in Calgary while laying out Canada’s down-graded emission targets."

"Downtown Chicago has the highest peak levels of nitrogen dioxide in the country, and is the only site in violation of new stricter guidelines against the irritant, which inflames asthma and other lung conditions."

"A bipartisan group of U.S. senators on Thursday introduced legislation aimed at slashing emissions of sulfur dioxide, mercury and nitrogen oxide from smokestacks including coal-fired power plants."