Last week, the Trump administration delivered “one of the single largest deregulatory actions in U.S. history” when it ended the 2009 “endangerment finding,” which definitively and legally classified carbon dioxide as a threat to public health. This legislation fundamentally underpinned any legal authority at the federal level to restrict greenhouse gas emissions in the United States. As such, this action rescinds all emissions standards for cars and trucks effective immediately, with enormous implications for the electric…