There are a number of renewable energy technologies that are currently in use all over the world and are fairly common. Wind farms, solar panel farms, hydroelectric projects, biomass where we are burning, usually natural waste, say from a farm or other facility, which is just waste product that would otherwise not be used is burnt and generates power. Landfill. Gas methane from rotting rubbish is tapped and burnt to generate power.

There are a number of immature technologies still in development that hold a lot of promise. For example, energy from waste tidal barrages, where we build a large facility stretching across a lake or a part of a ocean, where the tidal movements are quite substantial. And we use those tidal movements to generate power, geothermal power, where we are tapping into the earth's internal heat and floating offshore wind platforms, which are not anchored to the seabed, and hence can be used in much deeper water than the more common anchored offshore wind platforms, which can operate only in relatively shallow water and in development. Again, showing a lot of promise wave power using the movement of waves across the surface of the sea or a large lake and capturing that movement and using that to generate energy or hydrogen power where renewable energy is used to split hydrogen off molecules of water and that hydrogen can then be burnt for energy.