This is a rather disconcerting article. Basically Google is killing the planet. Perfect. The article claims:
While millions of people tap into Google without considering the environment, a typical search generates about 7g of CO2 Boiling a kettle generates about 15g. “Google operates huge data centres around the world that consume a great deal of power,” said Alex Wissner-Gross, a Harvard University physicist whose research on the environmental impact of computing is due out soon. “A Google search has a definite environmental impact.”
Even more disconcerting considering that my immediate reaction was to google it in order to find out if it was true.