If you want to know, watch an inconvenient sequel. You don't have to vote Democrat, you just have to watch it once and make up your own mind. Write your own movie review of it. Make a review of that movie into a blog, what you agreed with or disagreed with.
It's NASA and scientists and astrophysicists that coined the word many many years before Al Gore was in office. He simply connected environmental awareness and concern to Washington who, back in the 70s, when Al Gore was probably a young long-haired hippie, had zero people caring about the environment. However he broke through only to the Democrat party and zero Captain Planet people exist for the Republican Party - except McCain. His answer on which alternative energy source to use? All of them.