In 2007, the Supreme Court ruled in Massachusetts vs. EPA that when the United States Congress passed the Clean Air Act in 1970, climate science was “in its infancy,” implying that government officials could never have intended for the legislation to cover the regulation of greenhouse gas emissions. In 2022, SCOTUS doubled down on that idea, ruling in West Virginia vs. EPA that since the Clean Air Act didn't explicitly talk about climate change, the EPA cannot regulate greenhouse gas emissions. Now, new historical evidence unearthed by a team of Harvard University researchers led by Naomi Oreskes calls the court's understanding of the history of climate science into question, which could have major implications for the government's ability to regulate climate-changing emissions.