I am not sure if it is the final direction you are going in but you mentioned your interest in environmental impact and how to address the problem. Aside from the current skyrocketing gas prices, I think the most effective "product" to address climate change was a power point presentation. Now Al Gore's movie/presentation was not without its flaws but its approachability and high media profile probably motivated more people than 20 years of hippies banging on drums stoned out of their tie-died heads. The reason I bring this up is not because I think you should run for vice president, (apparently anyone can..cough cough) but because when approaching the issue of environmentalism there are non traditional methods of remedying the issue.
I think once you choose a specific area more of these nontraditional approaches to environmentalism will become apparent.