Need to take your CO2 savings up a notch? If you use AC, try turning it up by two degrees for a week. No sweat.

Cutting back on your air conditioning just a little bit will reduce your CO2 emissions by 5.4 lbs for the week. 8.54 tons 3166 3166 people have reduced CO2 emissions by 8.54 tons by completing this challenge so far. That's equal to turning off the electricity of 7 homes for about 1 month! That's equal to turning off the electricity of 7 homes for about 1 month! http://www.carbonrally.com/challenges/22-air-conditioner-costs/referral