When the US was attacked during the second world war no one asked, “Can we afford to fight the war?” It was an existential matter. We could not afford not to fight it. The same goes for the climate crisis.
I don't like that the author is comparing the climate crisis to an attack on the US. I know we need to start somewhere. However, the climate crisis is a world wide issue not just ours. The world governments need to get together and come up with plans as a whole to fight the crisis.