While there's a lot of hype around "green" jobs, careers, economies, etc., there's the case for stopping and doing something RIGHT WHERE YOU ARE... presuming you haven't been downsized in the crap economy.  Revamping your current company or organisation from the inside is a great way to make a difference in the world, and thankfully there is now a guide to doing it.  Called "Making Your Impact at Work", this handy little (FREE!) book puts together a lot of useful tips, resources, and case studies of people who have made it happen.  According to the Net Impact website, it "is designed to empower current and aspiring social intrapreneurs to find ways to integrate sustainability into their day jobs."  Take it to work baby!