A 'carbon neutral' energy source contributing to renewable energy. For example, short rotation coppice or willow plantation uses carbon dioxide to grow plants. Crops may then be burned to create energy - hence carbon neutral.

Crops grown specifically for their fuel value. These include food crops such as corn and sugarcane.

Crops grown specifically for their fuel value, including food crops such as corn and sugarcane, and non-food crops such as poplar trees and switchgrass. Environment: All the natural and living things around us. The earth, air, weather, plants and animals all make up our environment.