This month's Do the Green Thing "challenge" is to stay grounded. That means no boarding the plane for the holidays. Planes can churn out loads of C02 in the atmosphere. Sure, lots of cars also do. But in this case, the C02 is dumped high up in the atmosphere, giving it a lot of adverse effects. If you avoid that plane trip, you save as much C02 as a year's worth of heating and electricity.

So head on over to Do the Green Thing and make your C02 savings count!