Although I am not very actively involved in a lot of causes at the present, due to having 4 young daughters, I do try to do my part whenever possible. Hopefully when my kids are older I can become more physically involved (and get them to join my passions)I support the following:
The Rain Forest and Big Cats through Care2
American Society For The Prevention of Cruelty to Animals
Houston Humane Society
World Wildlife Fund
Heehee, see a pattern building here? Although I agree with most causes out there that support saving our environment, I am an animal fanatic and everyone who sends me things pertaining to animals in need get my attention REAL FAST!
When I have a little more time I would like to become involved in more Children's causes like volunteering at the local Children's Hospital or Make A Wish Foundation, something along those lines.