Green Geeks: greengeeks.com/track/sarahbassetteco Most of us are unaware of the online carbon footprint and internet pollution caused by our digital habits. The carbon footprint of the internet and the systems supporting it is estimated to account for about 3.7% of global greenhouse emissions. In comparison, air travel is thought to account for around 2%. Find out who the biggest digital polluters are and easy ways to lower your online carbon footprint.