Sustainable Energy


Sustainable energy is energy that is consumed at insignificant rates compared to its supply and with manageable collateral effects, especially environmental effects.

Sustainable Energy for All by United Nations Foundation


Another common definition of sustainable energy is an energy system that serves the needs of the present without compromising the ability of future generations to meet their needs.

Powering the Future with Sustainable Energy by Stanford


The organizing principle for sustainability is sustainable development, which includes the four interconnected domains: ecology, economics, politics and culture.

Sustainable development is a process for meeting human development goals while sustaining the ability of natural systems to continue to provide the natural resources and ecosystem services upon which the economy and society depends.

An organizing principle is a core assumption from which everything else by proximity can derive a classification or a value.

In ecology, sustainability is the property of biological systems to remain diverse and productive indefinitely.


Sustainability science is the study of sustainable development and environmental science.

Sustainability science has emerged in the 21st century as a new academic discipline.


Technologies that promote sustainable energy include renewable energy sources, such as hydroelectricity, solar energy, wind energy, wave power, geothermal energy, bioenergy, tidal power and also technologies designed to improve energy efficiency.

Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture and artificial photosynthesis.

Renewable energy is generally defined as energy that is collected from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.

Wave power is the transport of energy by wind waves, and the capture of that energy to do useful work – for example, electricity generation, water desalination, or the pumping of water.


Costs have fallen dramatically in recent years, and continue to fall.


Most of these technologies are either economically competitive or close to being so.


Increasingly, effective government policies support investor confidence and these markets are expanding.


Considerable progress is being made in the energy transition from fossil fuels to ecologically sustainable systems, to the point where many studies support 100% renewable energy.

The incentive to use 100% renewable energy for electricity, heating and cooling and transport is motivated by global warming, pollution and other ecological as well as economic and energy security concerns.

Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.

A fuel is any material that can be made to react with other substances so that it releases chemical or nuclear energy as heat or to be used for work.

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