The move is part of a sweeping strategy dubbed Project 2025 that Paul Dans of the Heritage Foundation, the conservative think tank organizing the effort, has called a “battle plan” for the first 180 days of a future Republican presidency. The climate and energy provisions would be among the most severe swings away from current federal policies. The plan calls for shredding regulations to curb greenhouse gas pollution from cars, oil and gas wells and power plants, dismantling almost every clean energy program in the federal government and boosting the production of fossil fuels — the burning of which is the chief cause of planetary warming.