Of course economy. Environment is just one of the externalities. Also, environmental issues are mostly just a pretext for geopolitics right? Say, real deal about global warming isn't saving some turtles or some Pacific islands from sinking, but crippling bad guys such as Russians and Arabs who export oil, right? It's a way of putting liberals, unknowable to them, in the same directions as conservatives are.
Not at all. I believe in reality of global warming. But, political reality is different from physical reality: it exists in political reality and in public perception only for the reasons i cited. Otherwise, ofc it would still exist, but we wouldn't know or care.