No Impact Man , a.k.a. Colin Beavan, took a yearlong vow to live a zero-waste lifestyle in New York City. The experiment inspired a blog, a book, a film - and others to embrace green habits. This week's tips will help you try a one-week carbon cleanse. Sign up here to share the results of your own No Impact Project.

Tip #2: Choose Greener Transportation Methods

Colin Beavan and his family phased out all forms of mechanized travel, including planes, cars, taxis, subways, and even elevators, for their No Impact year. For your carbon cleanse, discuss ways to reduce your family's dependence on petroleum-fueled transit. If it's not feasible to walk or bike to work , consider carpooling or taking public transportation.

Share your tips: How do you green your transportation?