The main purpose of this legislation is to cancel a specific rule set by the Environmental Protection Agency (EPA) that establishes standards for greenhouse gas emissions from fossil fuel-fired power plants. The objective is to eliminate regulations that the sponsors believe may be too restrictive on energy producers, particularly those using fossil fuels. Key provisions of this legislation include the outright nullification of the EPA's final rule concerning new performance standards for greenhouse gas emissions from new, modified, and reconstructed fossil fuel power plants.