Yesterday, we brought you a roundup of how geothermal and bioenergy are helping populate the bustling world of alternative energy sources. Today Crikey continues this exploration with the help of the Climate Council and climate solutions analyst Petra Stock to see what else is going on in Australia beyond the obvious sources of solar and hydro.

Solar thermal plants

How does it work: Plants vary according to resource and technology, but involve concentrating sunlight, generally off mirrors, to heat a substance, either liquid or salt, that can then be used to power steam turbines.