Hemp

Hemp has omega-3 and omega-6 essential fatty acids, contains 33 percent protein, is a good source of vitamin E and is low in saturated fat. It's an environmentally friendly crop that grows fast and requires few pesticides. But it is also a controversial food source because of its relationship with its cousin, marijuana.

America's first house made primarily of hemp has been built. Using a product known as Hemcrete – a mix of industrial hemp, lime and water – a team of 40 volunteers, sub-contractors and designers have recently completed construction of a hemp house located in Ashville, North Carolina. Eco-friendly design and construction company Push Design has gained the support of community members and local officials alike and now plans to build more.