The Welsh Assembly plans to increase the use of renewable sources to produce electricity in a ‘Low Carbon Revolution’, launched today.
Welsh environment minister, Jane Davidson, said renewable sources of electricity could be doubled by 2025.
Electricity supplies would come from water, wind, marine and biomass sources.
The Low Carbon Revolution policy statement also highlighted plans to create more “green” jobs, and use energy more efficiently.
The measures announced were welcomed by environmental campaigners Friends of the Earth. But the group warned against constructing a barrage in the Severn estuary to harness tidal power.
The Assembly Government says it supports a UK Government study considering ways to exploit the estuary’s power.
Ms Davidson said: “I believe that Wales should be at the forefront of the transition to low carbon energy as part of the global fight against climate change. Energy - how we generate it and use it - is the key to meeting this challenge.”
About 40% of the electricity used in Wales could come from the sea, a third from wind, and the rest from biomass or smaller production projects.
The minister added: “Wales once led the way in carbon-based energy. Our goal now is to do the same for low carbon energy.”
Peter Davies, commissioner for Wales on the Sustainable Development Commission, said: “We urgently need to ensure a secure, affordable, low carbon energy supply.
“Wales is well placed to use the opportunity of renewable energy to renew the economy.”