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mercury

More than two-thirds of fish tested by the federal government between 1998 and 2005 are contaminated by mercury at levels exceeding EPA standards according to a recent report.

Contamination is widespread, the report said, coming from various sources depending on geography. Coal-fired power plants are the largest source of mercury, although 59 of the 291 streams studied may have been affected by gold and mercury mining. The highest mercury levels were found in the south and southeast-North and South Carolina, Georgia, Florida and Louisiana, while elevated levels were found in mining areas of the West and watersheds in the Northeast and Upper Midwest.

In 2008, Earthjustice successfully appealed an EPA rule favorable to industry which would have allowed dangerous levels of mercury to persist. We’re waiting for the Obama administration to make good on its promise to introduce new power plant emission regulations.

We've told you about the dangers of eating mercury-contaminated fish. Today, the US Geological Survey released a comprehensive study linking the mercury emissions from smokestacks here in the US and abroad, and the contamination of fish like tuna and other marine life in the Pacific Ocean. According to the NY Times and Greenwire:

The study documents the formation in the North Pacific of methylmercury, a highly toxic form of mercury that rapidly accumulates in the food chain to levels that can cause serious health concerns for people who consume seafood. Scientists have known for some time that mercury deposited from the atmosphere can be transformed into methylmercury, but the study focuses on how that transformation occurs.

USGS showed that methylmercury is produced in mid-depth ocean waters by processes linked to "ocean rain." Algae, which are produced in sunlit waters near the surface, die quickly and rain downward to greater water depths. The settling algae are decomposed by bacteria and the interaction of this decomposition process in the presence of mercury results in the formation of methylmercury.

Many steps up the food chain later, predators like tuna receive methylmercury from the fish they consume, the study shows.

EPA Administrator Lisa Jackson said, "This study gives us a better understanding of how dangerous levels of mercury move into our air, our water, and the food we eat, and shines new light on a major health threat to Americans and people all across the world."

Just last week, the EPA proposed significant cuts in cement kiln mercury emissions (up to 16,000 pounds a year), and we’re hopeful they will continue this leadership when they work to cut mercury from coal-fired power plants sometime in the future.

Mercury is a neurotoxin especially dangerous to young and unborn children, and women of childbearing age are often warned to limit their consumption of contaminated fish (like tuna, shark, walleye, or wild striped bass).

The first Earth Day, 39 years ago today, was a godsend for a country mired in war and riven by racial, political and cultural issues. Arriving suddenly—as a gift whose time had come—it offered folks something to unite around: the idea of an entire planet, our home, in peril.

One of the many dirty little secrets about oil shale is that it will take huge amounts of energy to turn rock into a product we can put in our cars and trucks.  That's because the currently proposed technology for producing oil shale involves using what amounts to glorified curling irons underground, heating them up to hundreds of degrees and melting the "kerogen" into something that can be sucked out of the ground and could be refined into a useable product.

What do San Francisco Bay, Puget Sound, and Chesapeake Bay have in common? They provide a distinctive signature to some of America's greatest cities, of course. Residents and visitors to San Francisco, Seattle, Baltimore and Washington love to walk along, play beside, and boat across these waters. All three have storied histories and strong citizens' organizations fighting to protect and restore them.

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unEARTHED is a forum for the voices and stories of the people behind Earthjustice's work. The views and opinions expressed in this blog do not necessarily represent the opinion or position of Earthjustice or its board, clients, or funders. Learn more about Earthjustice.