To me, one of the most primal activities is to draw. It just seems so natural and such the right thing to do to express certain feelings. I really enjoy drawing on odd surfaces where possible. At the moment my favourite is envelopes which I suppose isn't too strange. Re-using things and minimising waste is always running through my mind so drawing on surfaces that were not made for that purpose is fun and eco friendly :)
In this photo Cynthia demonstrates one of the most eco friendly ways to draw, but sadly in a temporary medium. At least we have cameras.