FORMER VICE PRESIDENT of the United States Al Gore has just finished a half-hour AMA (ask me anything) session on Reddit.

Here are his best bits…

• alllie: Some years ago you were asked if you thought the 2000 election was stolen. You said: “There may come a time when I speak on that, but it’s not now; I need more time to frame it carefully if I do. In our system, there’s no intermediate step between a definitive Supreme Court decision and violent revolution.” Are you ready to address that question now?

I haven’t ruled out addressing that at some point in my life, but no, I don’t believe now is the time to do it, if that time ever comes.

• antiscian: For people that may be sceptical about global warming, what is the one undeniable scientific fact that you feel backs it up the most effectively?

There are at least 15 deeply researched separate lines of evidence that all confirm man-made global warming. They are all consistent, each with the others. Every National Academy of Science on the planet agrees with the consensus. The Academies describe the evidence as “indisputable”.

Every professional scientific society in every field related to climate science and earth science also agree. And 97-98% of climate scientists worldwide most actively publishing also agree. Animals and plants also agree — in that they are moving their ranges by latitude and altitude to find climate niches similar to the ones in which they evolved.

Even if you leave climate science completely out of it and just measure extreme temperatures, the statistical record of global temperatures shows that three-standard deviation events have increased from 0.25% of the time (from 1951-1980) to 10% of the time now. There is as strong a consensus as you will find in science, with the possible exception of the existence of gravity.

• pagemansmith: I understand you and Tommy Lee Jones were roomates in college. What was he like?

He is, first of all, a terrific friend. He really is an amazing guy. As good at directing as at acting, btw. Check out his performance in Spielberg’s Lincoln. Incredible! I hope he gets another Oscar for it. I’m biased, but I sure think he deserves it.

• Oogity_Boogity_Boo: What advice would you give President Obama to accomplish his objectives during his second term? What advice would you give to us, the public, in dealing with the harsh realities of the partisan divide?

Stand on principle. As Mark Twain said, “Do the right thing! You’ll ratify your friends and astonish your enemies.” Start with climate.

Read: Al Gore to launch 24-hour ‘reality campaign’ to convert climate skeptics