Renewable energy is energy that is derived from natural processes (e.g. sunlight and wind) that are replenished at a higher rate than they are consumed. Solar, wind, geothermal, hydropower, bioenergy and ocean power are sources of renewable energy. The role of renewables continues to increase in the electricity, heating and cooling and transport sectors.

How solar energy could be the largest source of electricity by mid-century

To achieve that vision, IEA reports call for clear, credible consistent signals from policy makers More »»

Policy uncertainty threatens to slow renewable energy momentum

According to the IEA Medium-Term Renewable Energy Market Report 2014, power generation from renewable sources such as wind, solar and hydro grew strongly in 2013, reaching almost 22% of global generation, and was on par with electricity from gas, whose generation remained relatively stable. Global renewable generation is seen rising by 45% and making up nearly 26% of global electricity generation by 2020. More »»

Any country can reach high shares of wind and solar power cost-effectively

While wind and solar photovoltaic technologies are crucial to meeting our future energy needs, the inherent variability in both can raise concerns. The IEA publication "Power of Transformation: Wind, Sun and the Economics of Flexible Power Systems" addresses the additional costs that might arise from increased adoption and proposes strategies to develop a flexible system in the long term. More »»

About renewable energy

Renewable energy technologies have significant deployment potential as resources are spread globally, in contrast to the conventional sources such as gas, coal and oil, which are more geographically concentrated. All countries in the world have at least one abundant renewable resource and many countries have a portfolio of resources.

The role of renewable energy is expected to increase significantly over time in all IEA scenarios with greater contributions to the power generation, heating & cooling and transport sectors.

Renewable energy technologies are a crucial part of a portfolio of options that are needed for achieving a secure and sustainable energy mix, together with energy efficiency and other low carbon options. A diversified portfolio of renewable energy can provide countries with a number of benefits that are not fully internalised in current energy market prices:

  • environmental impacts, including greenhouse gas emissions and local pollutants;
  • energy security;
  • strategic economic development, including rural development, the agricultural sector and high-tech manufacturing;
  • energy access trough distributed or off-grid solutions. 

Against this backdrop, governments have put in place supportive policies. As a result, renewable sources have been the driver of much of the growth in the global clean energy sector since the year 2000. The role of renewable sources in the global power mix, in particular, continues to increase rapidly. On a percentage basis, renewables continue to be the fastest-growing power source. As global renewable electricity generation expands in absolute terms, it is expected to surpass that from natural gas and double that from nuclear power by 2016, becoming the second most important global electricity source, after coal. Globally, renewable generation is estimated to rise to 25% of gross power generation in 2018, up from 20% in 2011 as deployment spreads out globally.


Global renewable electricity production by region


IEA, (2014), Medium-Term Renewable Energy Market Report 2014, OECD/IEA, Paris.


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