Three south Wales valley councils are drawing up plans to build a multi-million pound waste facility.
Torfean, Blaenau Gwent and Caerphilly councils have joined forces to look at the options to stop food and garden waste from being landfilled.
The facility could cost up to £7 million and the best site will be chosen within the boundaries of one of the county boroughs.
Three technologies are being assessed anaerobic digestion, in-vessel composting and windrow composting to treat organic waste from around 140,000 homes in the three county boroughs.
The three councils, which will procure a facility under the name Heads of the Valleys Waste Programme, is now waiting for the Welsh Assemblys views on its draft outline before deciding its next steps.
Heads of the Valleys Waste Programme project manager Frances Williams said: We must find alternative options to reduce the amount of waste sent to landfill or face huge fines which will have to be passed on to the taxpayer. We are also committed to finding more sustainable ways of working.
As a result of these challenges, the Welsh Assembly has encourage authorities to form partnerships to work together to deliver facilities.
We will communicate any future decisions with our residents so they fully understand the reasons for the facility and its eventual location.