CO₂Stats is a free tool that can be embedded into any Web site to calculate the carbon dioxide emissions associated with using it. That estimate is based on an assumption of 300 watts of power consumed by the personal computer, network and server involved — or 16.5 milligrams of CO₂ emitted every second of use. “The typical carbon footprint is roughly equivalent to 1.5 people breathing,” says physicist Alexander Wissner-Gross of Harvard University, who co-created the Web tool. The founders then purchase enough renewable energy to account for the electricity used.

Grâce à CO₂Stats, vous pouvez connaître l’empreinte carbone de votre site. Apparemment, en moyenne, un site est l’équivalent de la respiration d’une personne et demie… Enfin, moi, visiblement, je n’en suis pas encore là !

Source : Scientific American, avril 2008, p. 26.