Whether labeled global warming or climate change, the theory that man-made greenhouse gas (GHG) emissions will cause catastrophic warming is the justification for onerous climate policies that will limit or eliminate the use of fossil fuels: coal, natural gas and oil. These policies have now been institutionalized in the Environmental Protection Agency (EPA) rules and in other actions across the federal government.
The U.S. Congress, however, has repeatedly refused to delegate authority to federal agencies to control greenhouse gases— among which carbon dioxide (CO2) is by far the dominant source.