The plant hemp seems to have not gotten any attention in the last few years, with the stresses being put on the planet's oil reserve reaching peak level it seems that hemp would be the perfect alternative, its uses cover:
Use with plastics
Cordage (rope etc)
Water and soil purification
and most importantly: A fuel source.
My question is: can it really be the answer to a lot of our problems? It produces 25 tonnes of material per hectare per year, grows pretty much anywhere in the world and is useful as a fuel source. I understand the illegality through the cotton industry several years ago, but are there really any downsides or arguments against it other than 'it can make a drug that might make you lazy!!!!'