This isn't surprising. Thw US Constitution doesn't encompass all legislation or possibilities. That's the purpose of legislation from congress.
That so many keep turning tonl the constitution all the time for answers speaks volumes about how broken the US Congress and state level political systems are.
Basically if we want legislation to enforce climate stabilisation and prioritisation then the US needs to do something about it's polarised and clogged up political system.
Personally I think proportional representation to break the power of the duopoly of dems and repubs is the way to go. Citizens in individual states and communities may even have potential routes to do that at local levels through their plebiscite systems. They could break the system from the bottom but for whatever reason aren't.