Extraction itself, especially of oil, is directly subsidized by the Federal government in terms of tax breaks to the tune of billions of dollars. There is also permits to extract oil and coal on public lands, including some national parks. There's the entire military industrial complex set up to defend trade in these resources. Finally, there's an entire political party devoted to fighting any effort to put in place a carbon tax or other measure which would account for the emissions of CO2 as a pollutant that is an external cost of burning oil, coal, and gas.