Climate change is a tiny piece of a much larger cultural war. The battle lines of that culture war are falling almost identically with COVID, and that's a problem with much more direct and visible consequences.
I know David Attenborough credits Star Trek IV with saving the whales, but nobody was ever against saving whales. They just didn't care. In the case of climate, people actively do not want the climate problem solved -- they consider it a deliberate hoax being perpetrated on them, and even measures that improve their lives are rejected as being totalitarian.
It would be great if artists of some sort could change that. The propaganda that convinced them otherwise is, itself, a form of art. But they've got a huge thumb on their side of the scale: the law always favors inaction, and it takes only a moderate-sized minority to prevent anything to help. It doesn't matter how aware everybody else is if collective action is impossible.