Headlines about Supreme Court cases are almost uniformly misleading, because they suggest the Court is making decisions on policy issues rather than legal issues. The very first words of the opinion, on p. 2, make clear that the legal issue before the Court is very different: https://www.supremecourt.gov/opinions/21pdf/20-1530_n758.pdf The Clean Air Act does not purport to give the EPA blanket regulatory authority ov…
The headlines aren’t entirely wrong. If you look at the conservative majority opinions, you’ll find that indeed, it’s about the relevant legal issues, ie. what the law actually says. On the other hand, if you read liberal dissents, they’re mostly about what they think appropriate policy should be. In this particular case, the majority opinion starts off by quoting the relevant statute and analyzing its meaning, where…
>If you look at the conservative majority opinions, you’ll find that indeed, it’s about the relevant legal issues, ie. what the law actually says.
The dissertation focuses on that. The actual reasoning might be based on something else. The court is strongly interested in projecting an image of being neutral, and of only going off of the wording of laws, rather than involving their own biases. Thus, the majority opinion should be read as an attempt to assign such a motive to their decision, whereas the dissenting opinions attempt to assign the opposite motive. That is, they attempt to suggest that the majority ruled this way because they are insufficiently worried about climate change.