Where solar energy is concerned - and wind energy and battery storage and electric vehicles and efficiency technologies - that is what we are now seeing. So, yes, I'm very optimistic, but anyone who works on the climate crisis has an internal struggle between hope and despair. I won't deny that, but hope has always prevailed in my outlook.

I understand that being optimistic in this age is challenging, but I am optimistic nonetheless.

I was in elective politics for 24 years. I've made four national races, two for president, two for vice president. I have found there are other ways to serve, and I'm enjoying them.

I'm sorry I ever invented the Electoral College.

Future generations may well have occasion to ask themselves, "What were our parents thinking? Why didn't they wake up when they had a chance?" We have to hear that question from them, now.

Well, the title "An Inconvenient Truth" is a way of highlighting the reasons why some people, including the president, don't seem to accept the truth.

Plant trees, Lots of trees