Environmentalists fighting plans to expand a Nottingham incinerator took to the streets as part of their campaign.
A protest was held outside the Council House in the Old Market Square on Saturday about the Eastcroft site.
The Waste Recycling Group wants to build a third incinerator at the plant, off London Road, to burn an extra 100,000 tonnes of rubbish a year.
Jon Beresford from Nottingham Against Incineration and Landfill (NAIL) said there were concerns about pollution.
He said: "It is extremely important that people make their views known because we need to send a clear message to people we elect that we do not want yet another incinerator polluting our atmosphere."