>"If you worry about the environmental impact of printing a sheet of A4 every single day, you’ll be surprised to know printing one page per day would produce approximately 10 grams of CO2 in a year. In contrast, using a mobile device for one hour a day produces 1.25 Tonnes of CO2 at the end of the year, taking into account network and server infrastructure energy requirements."
This sounds like an apples to oranges comparison. Does 10 grams of CO2 in a year take into account the CO2 to produce and transport the paper so you can print out 365 pages in a year?