Biofuel has to be burnt. The heat is used to produce steam which turns electricity turbines, in much the same way as fossil fuels (coal, oil and natural gas) power stations. This burning releases carbon dioxide, but this is a recent recycling of the gas, with no carbon footprint.
None of the other three Is burnt.
* Solar uses photovoltaic panels or focussing mirrors.
* Wind uses the motion of the wind, like hydro power.
* Geothermal uses the existing heat from under the earth to produce the steam.
Wind energy, hydropower , solar energy biomass, biofuel, geothermal energy
C. Geothermal and solar energy are both renewable, while nuclear energy is noy...
Renewable energy: (solar, wind, water, hydro, tidal and wave, geothermal, ocean thermal, biomass and biofuel).
Renewable energy (solar, wind, water, hydro, tidal and wave, geothermal, ocean thermal, biomass, biofuel and hydrogen).
Renewable energy (solar, wind, water, hydro, tidal and wave, geothermal, ocean thermal, biomass and biofuel).
Renewable energy (solar, wind, water (hydro, tidal and wave), geothermal, ocean thermal, biomass, biofuel and hydrogen).
Renewable energy, not solar, wind, or water (hydro, tidal and wave) includes geothermal, ocean thermal, biomass, biofuel and hydrogen.
Renewable energy (solar, wind, water (hydro, tidal and wave), geothermal, ocean thermal, biomass, biofuel and hydrogen).
Renewable energy sources produce no greenhouse gases.Examples are solar, hydro, wind, wave, tidal, geothermal, biomass, biofuel and others.
Renewable energy (solar, wind, water, hydro, tidal and wave, geothermal, ocean thermal, biomass, biofuel and hydrogen).
Geothermal energy is not the same as solar energy- geothermal refers to heat generated by the earth, not the sun.
Renewable energy (solar, wind, water, hydro, tidal and wave, geothermal, ocean thermal, biomass and biofuel) does not contribute carbon dioxide (CO2) emissions to the atmosphere, unlike fossil fuels (coal, oil and natural gas).