One candidate, I wish he was doing more, but he's doing a lot with the bad hand he was dealt.

The other candidate has called climate change a hoax and will not only do nothing, but will prevent others from taking action.

The next few years do indeed mark a possible turning point in climate change. If the US shows good leadership on the world stage, that will be instrumental in mitigating the worst of climate change. Four years of Trump (or Haley, if Trump somehow loses the primary) is too many years.