Corn derived ethanol. Anything that requires more energy to produce than is derived from the final product.
Biofuels are fuel made from any plant or animal based products. Two traditional biofuels are wood and corn. Biofuels are renewable sources of energy.
biofuels
Biomass energy is a renewable energy source that comes from organic materials like plants and trees. When these materials are burned or converted into biofuels, they can produce heat, electricity, and other forms of energy.
Solar, Wind, Geothermal, Hydrogen, Biofuels, Ionic energy
In order to grow the crops required to produce biofuels more forests need to be knocked down to make the necessary fields.
There has not been a biofuel developed that produces oxygen as a byproduct.
Biofuels , Solar energy , Wind energy , Tidal energy are examples of some renewable energies
Cows fart we harness the energy and use it to power our spaceship motorcycles!
Biofuels are biomass( fuels) that generate energy from wood burning. They contribute to sustainability by producing steam for both heating and electricity.
Solar Hydroelectric Wind Geothermal Biofuels
All over the world. Coal is still a major source of energy, besides petroleum and petroleum products, while hydro, nuclear, wind, solar and biofuels are relatively minor (but hopefully increasing, as a percentage of overall energy sources, in the near future).