This paper concentrates on technologies used in alternative sources of energy, which
comprise 34.7% of total electricity generated. Paper 8 discusses emissions-saving
technologies in relation to the use of fossil fuels in electricity generated.
Alternative energy comprises renewable sources of energy (hydro; biomass; wind;
geothermal; solar, which includes photovoltaics and solar thermal [concentrating solar
power]; and ocean sources, comprising tidal, wave, marine currents, ocean thermal
energy and tapping the salt gradient), nuclear power, and waste. The use of renewable
sources of energy can be optimised if advanced energy storage systems are developed
and employed, so energy storage is another topic covered in this paper.