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April 17 2012


Q. & A.: Campaigning in an Age of Deadlock

Michael Brune, the Sierra Club's executive director, talks about the Obama administration's record on environmental issues, his group's priorities and the political landscape.

March 06 2012


A New East Asian Import: Ozone Pollution

Researchers find that westerly winds can push ozone across the Pacific to the Southwest, where it descends to the ground level, sometimes pushing concentrations to unacceptable levels.
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November 17 2011


On Our Radar: Arguments Fly at Hearing on Fracking

Environmental groups and other opponents of hydraulic fracturing protested outside the session in Dansville, N.Y., singing anti-drilling songs and waving signs.

November 09 2011


When Ozone Drops, Farm Workers Step Up the Pace

When ozone levels declined by 10 parts per billion - roughly the level of tightening proposed by the E.P.A. - productivity climbed 4.2 percent among workers in a study, researchers say.

July 08 2011


EPA Finalizes Interstate Air Pollution Limits for Eastern States

July 7, 2011 Washington, D.C.  — Today, the U.S. Environmental Protection Agency finalized new limits on interstate air pollution from power plants in the eastern half of the United States. The limits on soot and smog-forming pollutants are intended to make the air safer to breathe by curbing emissions that move across state boundaries. Earthjustice [...]

April 26 2011


When Refrigerators Warm the Planet

While the hydrofluorcarbons used in refrigerators do not destroy ozone, they trap heat when they are released and they reach high altitudes.

March 10 2011


Ozone Alerts in a Wyoming Valley

Yet some residents contend that ozone alerts and talk of pollution are part of an environmentalist plot to take down the oil and gas industry.

March 03 2011


EPA Estimates Clean Air Act Will Gain $2 Trillion in Health Benefits by 2020

  EarthJustice.org Includes 230,000 lives saved March 1, 2011 Washington, D.C. —  The U.S. Environmental Protection Agency today released “The Benefits and Costs of the Clean Air Act from 1990 to 2020” report estimating the health benefits from the Clean Air Act at $2 trillion by the year 2020, which includes 230,000 saved lives in that [...]

February 22 2011


A Stopgap for Global Warming

Given the delays in reducing emissions of long-lingering carbon dioxide, two groups suggest focusing on cutting black carbon and ozone so that an effect can be seen within a few decades.

November 12 2010


Support Grows for Expansion of Ozone Treaty

Ninety-one countries now favor expanding the Montreal Protocol to cover the proposed phase-out of HFCs, a potent greenhouse gas, according to an official who attended an annual meeting in Bangkok.

November 11 2010


On Our Radar: A Proposed Gas Tax Hike

Tom Carper of Delaware, a Democrat, and George Voinovich of Ohio, a Republican, suggest that 10 cents of the increase go toward paying down the debt and the rest toward transportation infrastructure.

May 03 2010


April 26 2010


Smog in a Rural Valley? Mystery Is Solved

A study suggests that the primary cause of the San Joaquin Valley's puzzling smog is actually cattle feed.
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