Eco-Resolutions: How to Increase Your Karma in 2012

If You've Got 30 Minutes for the Environment...

Older toilets use as much as seven gallons of water with each flush—when less than a gallon can do the trick. Not ready to replace a gallon guzzler? Fill a plastic bottle with water and a bit of sand or gravel and submerge it in the tank (careful to keep clear of the stopper) for a do-it-yourself low-flow throne.