I’d say it’s the exact opposite of a religion. We environmentalists have looked around at the state of the world, gathered evidence, considered the possibilities and (quite often) reluctantly come to the conclusion that “someone should do something” and “I am someone”.
Believe me, I would much rather that the world was fine and I could spend my time on something else instead.
I am convinced by the evidence, where global or local it all points in one direction. I’m also convinced by the successes, from the action against CFCs, the ever-growing amount of organic food available (again – it was all your grandparents had), and the cleaning up of rivers in many countries through to the many permaculture projects regenerating wasteland and making it productive for human civilization.
Humans are amazing. We can fix the world and we will fix the world. It does however seem that we will have to get on with building a better world without waiting for agreement from everyone, let alone governments.