Environmental campaigners have urged the Government to invest more in renewables, as the world's largest offshore wind farm was officially opened off the UK coast.
The Thanet offshore wind farm, off the south east coast of England, has 100 turbines which will produce enough green energy a year to power the equivalent of more than 200,000 homes.
Energy company Vattenfall, which has constructed the farm - now the biggest offshore wind site in the world - said the electricity produced substantially increases the amount of green power generated in the UK.
The total capacity of the UK's onshore and offshore wind turbines now exceeds 5GW, enough to power all the homes in Scotland.
The progress on wind power was welcomed by Energy and Climate Change Secretary Chris Huhne, who is attending the official launch of the wind farm.
Friends of the Earth warned the UK's record on renewable energy remained "dismal", and called on ministers to invest more in green power, saying it would also deliver jobs and low-carbon industry.