It's time to think about moving to Mars

On this 40th Anniversary of Earth Day, there is good reason to celebrate the efforts of individuals, communities, and businesses to repair this broken planet. We deserve a day to mark our achievements.

But there is bad news....

Like so many people, I was holding out hope for a binding policy agreement on climate change to emerge from Copenhagen. Despite a disappointing pronouncement from world leaders last month that nothing will be finalized, the event is on, President Obama and Chinese Premier Wen Jiabao will be appearing to...