I’ve heard that hemp has a ton of great uses – however this one is right up my alley. It is now being used to make concrete-like bricks that buildings can be built from. Carbon Negaive you say? huh? Basically the hemp locks up more CO2 in the growing and harvesting phases than it does in production. Have a read for more info, and check out the pics!
http://www.inhabitat.com/2009/08/24/hemcrete-carbon-negative-hemp-walls-7x-stronger-than-concrete/
The Evans Real Estate Group Blog 