A Chinese company plans to invest £2bn in two eco-parks in north and south Wales.
SinoFortone Group says it aims to build two biomass power stations on Anglesey and in Port Talbot.
Heat from the plants will be recycled to help produce prawns and vegetables.
Orthios Eco Parks Limited is proposing to build the sites and Chinese investment company SinoFortone Group will raise the cash.
Together they will develop the sites over the next three years.
The Orthios team has designed their first Eco Park to sit on the former Anglesey Aluminium site at Holyhead and says 500 new jobs could be created.