Definition of sustainability

Sustainability is to meet the needs of the present without compromising the ability of future generations to meet their own needs.

Sustainable energy

  • What is sustainable energy ?
Sustainable energy is energy that provides for the energy needs of today without compromising the energy needs of future generations.
  • The difference between renewable and sustainable energy
Most often, people interchange the phrases “Renewable Energy” and “Sustainable Energy” freely. However, sustainable energy has a much broader sense as it can include renewable sources, such as wind and solar energy, as well as non-renewable sources such as nuclear power, which could also be used as an energy source for generations to come.



The conventional sources of energy are generally non-renewable sources of energy, which are being used since a long time. These sources of energy are being used extensively in such a way that their known reserves have been depleted to a great extent. Most of the time these sources emit greenhouse gases.


Alternative energy refers to energy sources that have no undesired consequences such for example fossil fuels or nuclear energy. Alternative energy sources are renewable and are thought to be "free" energy sources. They all have lower carbon emissions, compared to conventional energy sources.
The Future of Renewable Energy -