A new state-of-the-art business park with the emphasis on renewable energy is planned for a Powys town.
The plans for the new park go on public display on Monday
About 10% of Great Oak Business Park's energy needs is likely to be met by renewable sources such as small wind turbines, says the Welsh Development Agency (WDA).
It will be built in Llanidloes on the site of the old KTH factory which shut with the loss of 250 jobs in 2003.
Friends of the Earth said the park was a "step in the right direction".
Work has already started in Llanidloes on new road links, while plans for the park went on public display in the town on Monday.
Plans are for 15 new units equipped with broadband technology. The WDA, which says the park could provide 100 jobs, said businesses had already shown interest.
Friends of the Earth Cymru gave the development a cautious welcome.
The Welsh Development Agency says there is interest in the park
Spokesman Julian Rosser said: "It's great to see that WDA starting to think of job creation from this perspective, and realising that greener buildings can bring benefits to business and the environment alike.
"It's also good to see this sort of development so accessible to local people through cycling and walking.
"But the development could go much further. The possibility of a few wind turbines is helpful, but they should also install solar panels and use local wood for heating."
The WDA said the emphasis was on "minimisation of the impact on the environment".
Agency director Dr Geraint Davies said: "We believe that the new business park, combined with its sustainable attributes, together with attractive buildings, a superb location, yet within walking and cycling distance of the town centre, will make this a desirable place for new and expanding businesses."
The project is also backed by the Welsh Assembly Government.