The Government have given the go-ahead to two offshore wind farms.
The green energy projects will be built at Race Bank and Dudgeon in the Greater Wash off the Norfolk coast will potentially generate enough electricity to power 730,000 homes.
The Department of Energy and Climate Change said the projects represented around £3 billion of investment.
Docking Shoal wind farm, also off the Norfolk coast, was not given the go-ahead because of the potential impact on Sandwich terns, whose colonies at Blakeney Point and Scolt Head Island fall within a "Special Protected Area", which is protected under EU wildlife laws.
Energy Minister Charles Hendry said: "The UK is racing ahead of the global field and these two new offshore wind farms underline this momentum.
"These two projects will not only bring us considerable amounts of clean energy, but significant investment and jobs too."
Work could begin on the Race Bank project next year.