>2007 - Al Gore for promoting environmental awareness? That's kind of the wrong category.
That depends on your perspective: within the next century or two climate change will likely be the single largest driver of warfare the world has ever seen. With flooding, drought, and famine striking simultaneously around the world things are going to get really ugly.
Still, I don't know that his sensationalist exploits in "raising awareness" should compare to people that actually get things done.
Then give it to Gore in 100 years or so. If we need to give it to Gore now, then let's also give it to the people who warned us about killer bees, overpopulation. and invaders from Mars.