Belive it or not, purchasing refurbished hardware equipment, such as server, storage, tape library, switch etc. can save a lot of CO2.
How much? Here is an example. Let's say you purchase 10 units of refurbished Lenovo Thinksystems. By chosing refurbished instead of new you save about 6,42 tons of CO2. It's a lot! You use the same amount of CO2 if you drive a new registered car around the world once.