Three environmental groups filed a lawsuit against the Tennessee Valley Authority (TVA) in the federal district court for the Middle District of Tennessee alleging that the TVA violated the National Environmental Policy Act (NEPA) when it decided to replace a coal-fired power plant that it was retiring with a combined-cycle gas plant. The groups alleged that the TVA failed to evaluate “the climate-warming impacts of the Plant’s emissions, the viability of carbon-free alternatives, and the cost of mitigating emissions in compliance with the climate objectives of the United States to decarbonize the power sector.” In addition, the groups alleged that the TVA refused to calculate how the Inflation Reduction Act (IRA) would affect the costs of carbon-free alternatives. They also alleged that rolling blackouts that occurred as a result of a winter storm in December 2022 undermined the final environmental impact statement’s (final EIS’s) “assumption that gas plants would provide firm, reliable power in a way that carbon-free alternatives could not.” The NEPA violations asserted by the groups included failure to consider the plant’s climate consequences; failure to take a hard look at the impacts of a connected action (a gas pipeline to supply fuel); failure to objectively consider reasonable carbon-free energy alternatives, such as a solar and battery-storage option that the TVA dismissed based on transmission issues; and failure to rely on accurate economic assumptions to compare alternatives, including by excluding costs of carbon-capture technology and hydrogen conversion for the selected gas plant alternative, excluding social costs of greenhouse gases from its total system costs for the gas plant, and failing to consider economic incentives available under the IRA. The groups also contended that the TVA should have supplemented the final EIS to consider significant new circumstances and information regarding the unreliability of the existing fossil fuel-fired plant, the risks of extreme winter weather on gas supply and gas-fired power plants, and the resiliency of demand response, energy storage, solar, and wind, as demonstrated during the 2022 winter storm.

Challenge to the Tennessee Valley Authority's decision to replace a coal-fired power plant that it was retiring with a combined-cycle gas plant.

Appalachian Voices v. Tennessee Valley Authority

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Groups Challenged TVA Environmental Review for New Gas-Fired Power Plant

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An aim to achieve a quantifiable outcome within a given time-frame, set by an institution such as a national government.

Policy instruments are techniques or tools used by governing authorities to promote certain policies in order to achieve predetermined goals. Put simply, instruments are how a government tries to achieve its goals, with this taxonomy being focused on national policy instruments.

Risk is the potential for adverse consequences resulting from the dynamic interplay between (climate-related) hazards, exposure, and vulnerability of affected human or ecological systems.

Groups  of people who are adversely affected by climate change or the response to it

A set of principles, processes, and practices that build economic and political power to shift from an extractive economy to a regenerative economy.

Justice is the ethical and political framework that addresses fairness, including issues of responsibility, rights, and structural inequity.

Renewable energy means all forms of energy produced from renewable sources in a sustainable manner.

Fossil fuel is a generic term for non-renewable energy sources such as coal, fossil gas, and oil (including crude oil, and petroleum products), that can be used for electricity and heat generation. Fossil fuels are hydrocarbons formed from pressurised and heated organic material buried over millions of years.

Molecules in the atmosphere that play a key role in the greenhouse effect by trapping heat radiating from Earth’s surface.

Area of the economy in which actors engage in identical or related activities.

In human systems, the process of adjustment to actual or expected climate change and its effects, in order to moderate harm, increase resilience or exploit beneficial opportunities. In natural systems, the process of adjustment to actual climate change and its effects; human intervention may facilitate adjustment to expected climate change and its effects.

The management and allocation of funds, assets and investments to meet various objectives

A tax advantage is a fiscal incentive where the government reduces or exempts selected activities, goods or actors from taxes.

Codes and standards are regulatory instruments that specify minimum standards to protect health and safety. This ranges from performance standards, which prescribe outcomes while allowing flexibility to achieve compliance, to the more prescriptive approach of technology-specific standards.

A ban is a legal action that prevents the sale or supply of a product or service, or that recalls a product from the market. Examples are bans on SF6, greenwashing, fossil fuel advertisement or single-use plastics.

A target to reduce the prevalence of a greenhouse gas over a specific time frame

A commitment to balance GHG emissions with removal by a certain point in time, effectively reducing the net emissions to zero

Either money or something of monetary value is transferred between two or more organisations, people or countries.

Hot temperature extremes are daily maximum temperatures  that were exceeded on average once in a decade or once in 50 years, and includes heatwaves.

A long-lived, colourless gas, chiefly emitted from fossil fuel combustion, deforestation and cement production.

A potent, short-lived greehouse gas, largely released from livestock, fossil fuel extraction and waste management.

Actions to reduce emissions in energy generation and supply.

Technologies that capture and hold energy in reserve for later use.

Extreme weather refers to events where a weather variable exceeds (or falls below) a threshold. Meaning it is significantly different from the average or usual weather pattern.

A drought is an extended period of unusually dry weather marked by a significant and sustained lack of precipitation, falling below a specific threshold over a large area for more than a month

Air pollution involves harmful contaminants in the air, affecting both indoor and outdoor environments. It can lead to health issues like respiratory diseases and heart problems, and climate impacts such as global warming. Pollutants can damage plants, trees, habitats, and water bodies like rivers and lakes.

Electrical energy generated from mechanical devices driven by flowing fresh water.

Fossil gas, commonly known as natural gas, is a fossil fuel consisting chiefly of methane with smaller amounts of other hydrocarbons and trace gases, found in underground deposits.

Coal is a combustible sedimentary rock formed from carbonised plant matter, rich in carbon and hydrocarbons, and occurring in several main types including hard coal and brown coal.

People with different national or cultural traditions from the dominant population

Social and cultural groups that share collective ancestral ties to the lands and natural resources where they live, occupy or from which they have been displaced

Any compulsory, unrequited payment to the government levied on corporations or individuals. This can be for environmental reasons, such as introducing a Carbon tax to set a price that emitters must pay for the greenhouse gases they emit.

Activities of industries that extract natural resources, such as mining, oil, and gas, for commercial use.

The activities of industries involved in the production, distribution, and sale of energy, including electricity, gas, and renewables.

This sector involves managing waste treatment, sanitation, pollution control and environmental cleanup.

Activities that involve planning, designing and building infrastructure, residential, and commercial structures.

This sector involves activities to move goods and people, alongside the storage of products.

This sector creates and distributes information and entertainment through television, radio, print, and digital platforms.

This sector involves activities that impart knowledge and skills to individuals, including formal schooling, vocational training and educational support.

Activities that involve the cultivation of crops and raising of livestock for food, fibre, and other products essential for human life and industry.

Activities involving the catching, processing, and selling of fish for food, recreation, and industry.

Climate change can have a range of impacts on technological system. Extreme weather events can cause infrastructure failures like power outages or damage to roads and bridges, as well as the impacts from waste following natural disasters. Human activities also cause technological impacts, such as the risks posed by oil spillage and leaks.

Slow onset events evolve gradually from incremental changes over many years or from increased frequency or intensity of recurring events. As defined in the Cancun Adaptation Framework (2010), slow onset events include risks and impacts from rising temperatures, desertification, biodiversity loss, land and forest degradation, glacial retreat, ocean acidification, sea level rise, and salinization.

Heavy precipitation refers to any form of weather where substances fall from the sky, including rain, snow, sleet, or hail.

Groups Challenged TVA Environmental Review for New Gas-Fired Power Plant

Target

Policy instrument

Risk

Impacted group

Just transition

Renewable energy

Fossil fuel

Greenhouse gas

Economic sector

Finance