One of the most famous speeches in American history:

"We choose to go to the Moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too." - Kennedy

I believe that fighting climate change is a problem of similiar magnitude to going to the moon in 1969, and smaller than winning WWII. We did both of those things, we can do this. But we have to want to.