Carpooling is a very effective way to reduce greenhouse gasses, save gas, and go green. The challenge is finding someone who you commute with and know you are safe. Some companies have begun participating in carpooling websites so you can find someone at your work to commute with. Ask your company to get involved and start a car pooling initiative. If you can find someone to commute with, you not only reduce your commuting cost by 50%, but you also prevent more carbon dioxide from causing global warming.