Natural sources of energy
Renewable energy
Renewable energy
This is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geotermal heat.
Wind energy
Airflows can be used to run wind turbines. Modern utility-scale wind turbines range from around 600 kW to 5 MW of rated power.
Another sources of Eco-power
Biofuel
Biofuels include a wide range of fuels which are derived from biomass. The term covers solid biofuels, liquid biofuels, and gaseous biofuel.
Biomass
Biomass is biological material derived from living, or recently living organisms. It most often refers to plants or plant-derived materials.
Geotermal energy
Geothermal energy is from thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. Earth's geothermal energy originates from the original formation of the planet (20%) and from radioactive decay of minerals (80%).
My idea
The volcano power
There is a conteiner with water above the volcano's crater. Volcano heats water and it boils. The water vapour moves turbines which generates power. Water vapour cools down and flows again to the container. This cycle repeats.