Pin this page to activate the Live Tile. This will provide live printing tips, feedback and ratings on your Windows Start Screen.
In Internet Explorer on the Start Screen, press the favorites star
Then press the pin button, select 
Trees: corresponds to number of trees gone into making the paper.
Carbon: corresponds to greenhouse gases released in the production of the paper (CO2 equivalent).
Energy: represents the energy used to produce the paper, and is shown as the equivalent energy consumed by a standard 60W light bulb.