As someone who cares a lot about non-human nature, I find political decisions are never easy. I have been a registered Democrat since I first walked into the Pueblo County, Colorado, courthouse to register, but that does not always mean that I am comfortable in the party.
More often, I feel trapped between the Party of Enron, the Party of Bible-Thumpers, on one hand, and the Nanny-State Party, the Party of Institutionalized Victimhood, on the other.
On the national level, the Democrats take environmentalists for granted, just like they take black voters or Hispanic (illogical category, that) voters for granted. In all cases, the limousine liberals that run the national party could be in for a shock.
On the other hand--the Republicans--well, the leadership has made drilling the Arctic National Wildlife Refuge an article of religious faith. Not because it will end energy dependence, but just to show that if you can drill, then God wants you to drill.
Oh, there are Bull Moose/Teddy Roosevelt Republicans who believe in conservation, like my blogging buddy Steve Bodio, but they are in the same cold, dark, neglected corner as the gay Republicans.
It's interesting to look at other countries. In the United Kingdom, it's some Conservatives who are pushing an environmental agenda. Bull Moose Tories?