Displaying items by tag: epa

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).

Supreme Court air-pollution ruling calls into stark context all that must be done

This story was originally published by Tennessee Lookout.

KNOXVILLE — The U.S. Supreme Court’s ruling limiting the power of the Environmental Protection Agency to regulate carbon emissions that cause climate change has renewed the spotlight on the Tennessee Valley Authority, the nation’s largest public utility and Tennessee’s primary source of electricity.

The case involved EPA efforts to implement a key provision of the Clean Air Act in a challenge brought by 15 Republican-led states. That provision, which never went into effect, would have required existing power plants to shift from dirty sources of energy — such as coal — to cleaner sources, including solar and wind, as part of an urgent effort to reduce global warming.

Aerial view (ca. 2002) of Smokey Mountain Smelters Superfund site, located between two rail lines. At left is the overpass of Maryville Pike, at right a section of Knox County Development Corporation’s Montgomery Village Apartments. The large smelter hall and a few of the apartment buildings have since been removed.  Image from TN Dept. of Health

Knoxville’s most polluted former industrial site is slated for a massive cleanup soon thanks to funding from the bipartisan infrastructure bill Congress recently passed. The Smokey Mountain Smelters site in Vestal has spent more than a decade on the National Priorities List, commonly called the “Superfund” list, of the most contaminated properties in the U.S. 

The work could start within just a few months, said Rusty Kestle, Environmental Protection Agency project manager for the site. He said it’s the top priority in the Southeast for the infrastructure funding because it’s among the most affordable and ready for action.

NYT: EPA plans stricter regulation of HFC emissions

Hydrofluorocarbons were used on an industrial scale to replace ozone layer-destroying chlorofluorocarbons used in refrigeration, cooling and other applications, but they turned out to be a powerful driver of climate change. Scientists estimate HFCs are 1,000 times more potent than carbon dioxide in terms of their cimate-change role.

Oak Ridge National Laboratory scientists continue research into zero-emission refrigerant technologies. 

According to Times reporting: “In proposing a new regulation, Michael S. Regan, the E.P.A. administrator, said the agency aimed to reduce the production and importation of hydrofluorocarbons, which are used in refrigeration and air-conditioning, in the United States by 85 percent over the next 15 years.”

Great Smoky Mountains National Park Air Resource Specialist is seen at the Look Rock air quality research station.   Courtesy National Park Service

The lack of regional and local vehicle traffic during the pandemic greatly reduced measurable pollution in Great Smoky Mountains National Park.

This is your Hellbender weekend read, and the first in an occasional Hellbender Press series about the effects of the Covid-19 pandemic on the natural world

Great Smoky Mountains National Park shut down for six weeks in 2020 during the Covid-19 pandemic. Recorded emissions reductions during that period in part illustrate the role motor vehicles play in the park's vexing air-quality issues. The full cascade of effects from the pollution reductions are still being studied.

Hellbender Press interviewed park air quality specialist Jim Renfro about the marked reduction of carbon dioxide and other pollutants documented during the park closure during the pandemic, and the special scientific opportunities it presents.  He responded to the following questions via email.

Hellbender Press: You cited “several hundred tons" in pollutant reductions during an interview with WBIR of Knoxville (in 2020). What types of air pollutants does this figure include?