If you look at some of today's most prominent green activists and environmentalists, you'll notice that many of them have something else in common -- they're 50 or older. The individuals featured below have led remarkable careers for various reasons, but they have also dedicated time and energy to supporting green causes.
From protecting rainforests to advocating for animals and alternative fuels, the work of these individuals covers a variety of issues and causes.
With more attention going to the lives of "Post50" individuals, both in and out of the spotlight, it becomes clear that that generation still has their eyes toward the future, and it's never too late to promote important causes for future generations.
Check out our list of over 50 green activists, and add your favorite in the comments below.