"Last night’s climate town hall was seven hours long. You can be forgiven for not watching the whole thing; I didn’t. But if you tuned in for a two-hour stretch in the middle, you got to see the Democratic primary race’s three top contenders — Joe Biden, Elizabeth Warren, and Bernie Sanders — lay out their visions for how to solve the climate crisis. And they were very different visions.

Biden promised a return to the old status quo. Warren promised carrots and sticks to make corporations behave more sustainably. And Sanders promised to wrest control of the future from for-profit interests. The clock is ticking, and the choice is clear."