The federal government on Thursday rolled out the final plan for the nation's first vehicle emission and fuel efficiency standards.The new rules, aimed at reducing greenhouse gas emissions and U.S. oil consumption, will kick in for most passenger vehicles…

Green technology can take many forms, be it in eco-friendly light bulbs, hybrid cars, or wind turbines. It can even take the form of homework, as in the case of students competing in the Department of Energy's "Solar Decathlon."…