Sadly this isn't true. The changes required to make any significant difference would likely involve the end of capitalism as we know it, and thus they will never happen until a catastrophe occurs. You're living in a dreamworld if you think even something like the Paris accord is anywhere close. And climate change is just one small way in which we are ruining the world. Imagine what things will be like with 10 billion! Yet population control is taboo because fee fees. It's liberalism gone suicidal.