Fossil fuel regulations are part of the energy policy in the United States and have gained major significance with the nation's strong dependence on fossil fuel-based energy. Regulatory processes are established at the federal and state level due to the immense economic, socio-political and environmental impact of fossil fuel extraction and production. Over 80% of the United States' energy comes from fossil fuels such as coal, natural gas, and oil. The Bush administration was marked by the Energy Policy Act of 2005, which provided a monetary incentive for renewable energy adoption and addressed the issue of climate change. The Obama administration was made up of advocates for renewable energy and natural gas, while Donald Trump built his campaign on promises to revive the coal industry.