Sustainable and Renewable Energy:
Sustainable energy is frequently referred to by other names, such as renewable energy or alternative energy. It is important to understand the differences between these terms, though it should be noted the definitions themselves are often open to interpretation.
- Alternative energy is essentially an umbrella term that refers to any source of usable energy intended to supplement or replace fuel sources without the undesired consequences of the replaced fuels.
- Renewable energy refers to energy generated from natural resources, such as sunlight, wind, rain, tides and geothermal heat, which are renewable (i.e. naturally replenished).
Sustainable energy is the provision of energy such that it meets the needs of the present without compromising the ability of future generations to meet their needs. Sustainable energy sources are most often regarded as including all renewable sources, such as those mentioned above plus biofuels. It usually also includes technologies that improve energy efficiency.