Environmentalists on Stamps and First Day Covers

To my knowledge, this is the only virtual collection of collectible stamps on the topic of "environmentalists." We need more collectible stamps featuring environmentalists (and more environmentalists)!

We would like to make this collection as complete as possible! If you know of collectible stamps or First Day Covers of appropriate persons, please e-mail me a scan for inclusion on this website. If you do not have access to a scanner, please send a color photocopy.