From Jack's essay

No, we don’t know everything. We will never know everything. We do know is that the more we spew greenhouse gases into the atmosphere, the worse it gets for everybody. We also know there are things we can do about that, with vehicle emissions, for example. Yes, there will be people who will fight this because they care more about short-term profits.Perhaps what we need is a huge fight, and leaders who aren’t afraid of one.

Franklin D. Roosevelt, a man without the use of his legs, had more backbone than our last three presidents combined. He loved “to roll up my sleeves instead of twiddling my thumbs.”

“I would like it said of my first administration that in it the forces of selfishness and lust for power met their match,“ he said. “I would like it said of my second that in it they met their master.” I can’t imagine anyone with the guts to say that today.

FDR never heard of global warming. But he knew about big problems. A reporter once asked him what his ideology was. “I try something, and if it doesn’t work, I try something else.” If you need an ideology to save the planet, that sounds like a pretty good one to me.