“Green” was the word on everyone’s lips this year, as Al Gore collected his Nobel Peace Prize for raising awareness of climate change, hybrid vehicle sales surged up 49 percent from last year and the must-have accessory was a reusable cotton grocery bag that declared “I’m Not a Plastic Bag.”

In April the Supreme Court weighed in on the climate change issue, finding in Mass. v. EPA that not only does the EPA have the right under the Clean Air Act to regulate greenhouse gas emissions from new vehicles, but that it must do so.