You jumping of the deep end aside (a rhetorical joke)...
... when you stop flying, driving gasoline cars, eating meat and using anything derived from fossil fuels (your Nikon has a lot of plastic)... then we can talk.
In fact the only one thing you need to do is to recognize the situation objectively and tell your congressman that the US needs to act on global warming.
I don’t have anything to do on that front, the two countries I relate to are already aggressively acting in the right direction.
Is there a need to change individual habits also? Yes, to some extend. I drive no more than 6,000km a year in a pretty fuel efficient car at an average speed of less than 60 kph and always on highways. Most of my lights at home are efficient leds, the riskier ones on automatic presence detetors, my home is at the most stringent env spec I could afford,... although I have an Asia responsability at work I fly very little and try to manage by skype calls,... but I still eat meat, although not in very large amounts,... but due to health concerns and not environmental ones. I consume more stuff than I should,...
Visit some of the most eco minded countries on earth such as Sweden where I have just spent a week... I don’t have the feeling that those guys live a poor life as a result of their environment awareness!
Cheers,
Bernard