The Swansea Bay Tidal Lagoon project would create 1,000s of new green jobs but, under Theresa May, the plans have been shelved.
The lagoon would be the first of its kind and make Wales a world leader in green renewable energy.
Instead the Conservatives have decided to expand Heathrow Airport, in the face of major environmental concerns, rather than investing in the technology of the future.
The lagoon is vital in our fight to combat climate change and to move towards a sustainable future.
The Welsh Liberal Democrats are fighting to make sure it becomes a reality. Please back the campaign by adding your name below.