Extra Energy Supply Ltd (trading as extraenergy) was an independent retail energy supplier based in Birmingham, England. It supplied gas and electricity to domestic and small business customers.

Renewable energy in developing countries is an increasingly used alternative to fossil fuel energy, as these countries scale up their energy supplies and address energy poverty. Renewable energy technology was once seen as unaffordable for developing countries.

The renewable-energy industry is the part of the energy industry focusing on new and appropriate renewable energy technologies. Investors worldwide are increasingly paying greater attention to this emerging industry.

Utilita Energy is an electricity and gas supplier operating in the United Kingdom. Utilita began trading in 2003, specialising in pay-as-you-go metering.

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100% renewable energy is the goal of using fully renewable resources for all electric energy consumption. 100% renewable energy for electricity, heating, cooling and transport is motivated by greenhouse gas emissions, pollution, and other environmental issues, as well as economic and energy security concerns.

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E.ON UK is a British energy company and one of the largest suppliers of energy in the UK, following its acquisition of Npower. It is a subsidiary of E.ON of Germany and one of the Big Six energy suppliers.

China is the world's top electricity producer from renewable energy sources. China's renewable energy capacity is growing faster than its fossil fuels and nuclear power capacity.

The Centre for Renewable Energy Systems Technology (CREST) is a research centre into renewable energy based in the Department of Mechanical, Electrical and Manufacturing Engineering, Loughborough University in England.