Carbonrally, a web-based platform, does the job in uniting online social networking and carbon footprint tracking.
The company behind Carbonrally, posts regular challenges to help reduce greenhouse gas emissions. Offering a place to learn ways to live a green lifestyle and commit to those changes, Carbonrally lists many competitions like bringing in your grocery bags or adding air to your vehicle’s tires to reduce CO2 emissions of 6 pounds and 29 pounds in one month, respectively.
You can either team or do the challenges individually but being teamed up could add to the fiery spirit to being more green. Sounds like healthy competition.