Google measures carbon footprint 'per user' for greater transparency

Google has estimated its carbon footprint per user and says it is equivalent, on a monthly basis, to driving a car for one mile. The company believes that in serving an average user, it emits 8g of carbon per day. In making such a calculation, it is assumed that an active Google user is someone who does 25 searches, watches 60 minutes of YouTube a day, has a Gmail account and uses other Google services.