UNIT -3 clean energy Clean energy refers to the energy produced from natural resources that are sustainable and so can be replenished over a period of time. This energy is also known as renewable or green energy. Essentially, the production of any clean energy does not result in the creation of environmental debt. Additionally, the technologies used in producing this energy pollute less or do not pollute at all while they also do not utilize resources that cannot easily be renewed. Let’s have a close look at the various forms of clean energy available today Forms of clean energy and technology The basic sources of clean energy include water, sun (solar) and wind. Others include biomass energy, geothermal energy, biogas energy, wave and tidal energy. Solar energy This energy form utilizes technologies that tap the nuclear fusion power emitted by the sun. The energy is then collected and converted for use in various ways such as solar water heati