CO2.Earth's predecessor, CO2Now.org, is featured in October 2010 edition of Sustainability: The Journal of Record. The feature is part of a review of sustainability websites in the article, The Sustainability Web.
Here is a featured excerpt from the article
"Under the theory that if more people see the numbers, they will recognize the urgency of the situation, the most up-to-date numbers dominate the home page."
Sustainability Page 309 (Volume 3, Number 5)