No they can't. I mean, legally they have the authority to do so. But congress is pretty broken. By the time a congress is elected that can effectively legislate a solution to climate change, it will be too late.
Giving a broken legislative body the sole responsibility of literally saving the world is a really, really dumb idea.
We don't have time for that. By the time a congress is elected that is willing to make laws that curb emissions, it will be too late. So much damage will already have been done.
Pushing responsibility to literally save the world onto a broken legislative body is idiotic.