Displaying items by tag: methane emission

TVA’s Cumberland Fossil Plant near Clarksville is the subject of a suit filed by environmental groups, including Appalachian Voices and Southern Environmental Law Center.  Tennessee Valley Authority

SELC, others file suit in hopes of dissuading TVA from future fossil options

This story was originally published by Tennessee Lookout.

CLARKSVILLE — On behalf of the Tennessee Chapter of the Sierra Club and Appalachian Voices, the Southern Environmental Law Center asked TVA to prepare a supplemental environmental statement to address concerns with TVA’s draft environmental impact statement, which details the agency’s plans to retire the Cumberland Fossil Plant.

The Cumberland Fossil Plant, about 22 miles southwest of Clarksville, is TVA’s largest coal-fired power station and was built between 1968 and 1973. TVA plans to retire each unit of the two-unit, coal-fired steam-generation plant separately: one unit no later than 2030, and the second unit no later than 2033. But the plant will need to be replaced, and TVA is currently considering three alternatives to fossil fuel, including natural gas and solar energy, according to its draft EIS.

(Tennessee Valley Authority already plans to close down the Knoxville-area Bull Run fossil plant in Claxton next year).

Smithsonian: In Russia, even rocks emit greenhouse gases

The melting Siberian tundra north of the Arctic Circle released millions of tons of methane last year as regional temperatures rose to 11 degrees (°F) above average.

Methane has a shorter effect than carbon dioxide on global atmospheric change but is still 70 times more potent than CO₂ in its overall global-warming potential. Its accelerated release on such a vast scale represents an immediate challenge to restricting overall global warming to less than 3 degrees (°F) by the end of the century, which scientists agree is necessary to prevent dramatic climate change. Methane’s potent global warming potential is why many conservationists oppose the use of natural gas as an energy source.

But in Siberia, even the rocks are emitting methane. Scientists were surprised to find that limestone exposed by disappearing permafrost itself generated high levels of methane. Tundra fires have also accelerated the release of methane and other gases, and have come at great cost to the Russian government and the rural inhabitants of the vast region.

That means economical and practical means must be developed elsewhere, at least, for methane management.

But according to the United Nations Economic Council for Europe:

“Despite methane’s short residence time, the fact that it has a much higher warming potential than CO₂ and that its atmospheric volumes are continuously replenished make effective methane management a potentially important element in countries’ climate change mitigation strategies. As of today, however, there is neither a common technological approach to monitoring and recording methane emissions, nor a standard method for reporting them.“