Paul Krugman: Planet on the Ballot

We now have a pretty good idea who will be on the ballot in November: Hillary Clinton, almost surely (after the South Carolina blowout, prediction markets give her a 96 percent probability of securing her party’s nomination), and Donald Trump, with high likelihood (currently 80 percent probability on the markets). But even if there’s a stunning upset in what’s left of the primaries, we already know very well what will be at stake — namely, the fate of the planet.

Why do I say this?