About 200 people have taken part in a demonstration in protest at plans to build an incinerator in Plymouth.
Three councils have agreed preferred bidder status for German-owned MVV Environment to build the waste-to-energy plant in Devonport's North Yard.
The £140m incinerator will provide steam and energy for HM Naval Base Devonport.
A month-long consultation with residents from the Plymouth and Torquay areas is currently under way.
MVV said the plant will handle waste from Plymouth, Devon and Torbay that cannot be recycled to generate electrical energy and heat, "saving valuable fossil resources and reducing carbon dioxide output".
A series of roadshows have been held during February to show the background to the project and canvas views from local communities.
MVV has said the plant will produce 22.5MW of energy - enough to power 37,000 homes.
The more steam used by the naval base, the less power there will be, but any surplus will be exported to the national grid.