Industrial hemp (non hallucinogenic marijuana) is an environmentally-friendly cash crop which can be used in a number of food and industrial processes:

• hemp paper reduces the pressure on forest 
• hemp clothes are an alternative to cotton, which is typically grown with heavy pesticide use.
• hemp grows well in sandy soils, typically used for tobacco.

Here are some sources of information on hemp.  A couple of the links are now dead -- if you know of other links to add in, please let us know):

Hemp Canada (a dead link): Canada's foremost source of information on industrial hemp. Hemp Canada is dedicated to the promotion of the commercial hemp industry in Canada and around the world.

Hemptech: the industrial hemp information network.

Natural Life General Store: Hemp products for sustainable living. Some hemp products from Natural Life Magazine.

Canadian Industrial Hemp Council (a dead link): the Canadian Industrial Hemp Council champions the development of a regulatory framework for commercial industrial hemp production and processing in Canada.  CIHC is composed of farmers, scientists, bureaucrats, students, educators, and businesspersons.