In the early 90's I studied Graphic Design at the Johannesburg Art Foundation, then I spent a year in Holland, where I caught the Green Bug :)
It kept growing while I studied at Holon Institute of Technology in Israel, [BA Industrial Design ] and keeps growing ever since...
The mission is to design while taking into account the life cycle of a product, i.e. what material it is made of, how long will the consumers uses it, can it be recycled or up-cycled once it is no longer in use, packaging, etc.
I find that research and cooperation with other disciplines are necessary tools for sustainable design work, since many relevant aspects of the products are still less visible to us.