China Southern airlines has some advice for cutting global warming emissions when you fly–don’t pee in the plane. They claim each flush burns one liter of jet fuel, creating about 5.6 lbs of CO2.

Of course there are other ways to save jet fuel. For a cross-country flight, each extra pound you carry on puts almost a pound of CO2 in the air. Flying with skis and boots instead of renting slopeside puts about as much extra CO2 into the air as your drive from Salt Lake City to Alta.

So, when you are visiting relatives, don’t pig out before you go home. Step on a scale, then go running a few miles to lose the extra pounds.

Better yet–don’t fly at all. Get out the sleigh! After all, the horse knows the way–and nobody ever got a ticket for drunk sleigh riding.

Have we got that straight? Good! Now, enjoy the holidays!