Campaigners in Cornwall want the peninsular to postpone a decision on its multi-million pound waste contract until residents have been consulted.
Action group Rezolve has written to councillors asking them to produce a waste strategy with the public before announcing its preferred bidder.
The county received £25 million from the Government in 2003 towards a private finance initiative (PFI) aiming to take its recycling rate to 40%.
In its letter to Cornwall County Council, Rezolve chairman Deborah Clark wrote: "This PFI contract is the biggest ever let on behalf of Cornwall. In the absence of a waste strategy, the tender has been offered to commercial companies without adequate strategic guidance.
"Councillors have seen an early indication of concerns within the county on proposals for a single mass-burn incinerator destined to take 50% of Cornwall's waste.
"An enormous shift in thinking has taken place in recent years. This is a great opportunity for contemporary Cornwall to really show its colours.
"This is not a county where lack of consultation and outdated solutions should be considered acceptable."
Rezolve urged councillors to support the start of work on a municipal waste management strategy for Cornwall.
The group also asked councillors not to vote on the choice of preferred bidder or the contract terms for the waste PFI contract until this strategy was drawn up.