Renewable energy is one of the most important and widely researched topics today. It is classically defined as any form of energy that comes from renewable sources and, for all practical purposes,... Show moreRenewable energy is one of the most important and widely researched topics today. It is classically defined as any form of energy that comes from renewable sources and, for all practical purposes, cannot be depleted. This may include solar, wind, or geothermal power, as well as biomass or biofuels. When considering biomass, or any living or recently dead biological material, the chemical energy of the molecules is generally collected through the process of combustion. Show less