The United States currently relies heavily on coal, oil, and natural gas for its energy. Fossil fuels are nonrenewable, that is, they draw on finite resources that will eventually dwindle, becoming too expensive or too environmentally damaging to retrieve. In contrast, renewable energy resources are constantly replenished and will never run out. Here's a green energy infograph!
Biomass is biological material from living, or recently living organisms, most often referring to plants or plant-derived materials. Biomass is all biologically-produced matter based in carbon, hydrogen and oxygen. Biomass energy is derived from six distinct energy sources: garbage, wood, plants, waste, landfill gases, and alcohol fuels. Can this be worth looking into?