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One of the largest unions in Wales, Unite, has thrown its weight behind proposals to bring a tidal lagoon to Swansea Bay.
The £800m project could provide electricity for thousands of homes in Wales.
It's expected to be completed by 2018.
The union understands the project will create over 1900 full time jobs during the construction phase, with further jobs becoming available post construction.
You can see more on this story on Coast and Country tonight on ITV Cymru Wales at 8pm.
ITV News has learnt there could be several tidal lagoons off the Welsh coastline, if plans to build one in Swansea go ahead. The company behind the proposals says Wales could provide up to 10 percent of the UK's energy needs in the next 10 years.
The last stretch of the six-month planning process starts tomorrow. If the UK Government approves, work to build build a lagoon in Swansea could begin within a year. Jane Solomons reports.
ITV Wales has learned of potential plans for a number of tidal lagoons off the south and north coast of Wales.
Should a six mile tidal lagoon get the go ahead in Swansea, more have been planned for the Severn Estuary and off the coast of north Wales.
The company behind the proposals for an £850m lagoon in Swansea Bay say they want to build five lagoons around the UK that will generate up to 10 per cent of the UK's energy needs in the next 10 years.
This week marks the start of the public examination period for the Swansea lagoon - the last stretch of the planning process which could eventually lead to construction on the lagoon starting in less than a year.