Wow Tom, your only how old again? Must get stressful at times...but I just shrug stuff off and relax so I wouldn't know about stress.
Anyway, it's cool that your being charitable, personally I love the electric car idea, I had watched "Who Killed the Electric Car" and it was awsome. I would totally buy one (once I turn 16 and have money lol) so I think you should invest in that, would pay in the long run.
Have you put money into stocks?