Enviromental Charecters?

Which characters are environmental activists? i know Poison Ivy and Ra's Al Ghul are,but who else?

Captain Planet

Tempest from the Octessence was a game warden hunting poachers before she got her powers.

all good, I'm wondering if there are many eco-terrorists like Ra's and Ivy

Swamp Thing.

Hawkman became an environmentalist in Kingdom Come, no idea why. 

Atom Eve

Not a terrorist though.