Invest in a central air conditioning unit with a seasonal energy efficiency rate (SEER) of 14 or higher. You could reduce your carbon-dioxide emission by more than 1,500 pounds a year.

Buy a programmable thermostat. It will automatically adjust the temperature while you’re at work. A two degree adjustment can prevent 1 ton of CO2 a year.

You’ve no doubt heard all about hybrid cars on the road, the increasing popularity of wind generators, and products made from recycled paper, but have you heard what the carpet industry is doing for the environment?