The project has been described as "the most ambitious and comprehensive plan ever proposed" by the climate scientist Michael Mann.
A similar logic applies to what constitutes the largest CO2 emissions source in the United States: vehicle pollution. The case is emblematic: the Obama administration put in place tight regulations, which Trump removed. But the market has evolved since then. The auto industry, which had fought against Obama regulations and embraced Trump, is now converting to an all-electric production. This is the case of General Motors, which announced last month an all-electric production and the end of production of gasoline-powered vehicles by 2035. This market development could be a major source of results for the Biden administration, given the difficulties to be expected for binding regulation in Congress and the Supreme Court.