
You may have to start buying carbon offsets. In fact, Alex Wissner-Gross, the Harvard professor who did the study, discovered that just browsing a website uses 0.002 of CO2 per second. Google, none too happy with the report, is striking back, saying it has the most energy efficient data centers in the world and that driving a car for a kilometer, or 0.6 miles, equates with the amount of CO2 produced by a thousand Google searaches.