Cities, companies and families around the United States are taking steps to reduce their "carbon footprint."
A carbon footprint is the amount of carbon dioxide -- a greenhouse gas -- that they contribute to the atmosphere, which leads to more global warming.
ABC News would like to know:
What are you doing to reduce your "carbon footprint?"
Are you trying solar power? Hybrid car? Shorter showers? Energy efficient appliances?
Tell us your story. We may use it in segments on ABC News programs and on ABCNEWS.com. Please include your phone number in your message so we can call you with follow-up questions.