Campaigners opposed to the expansion of a Kent airport claim it could "devastate" local quality of life.
Plans would enable London Ashford Airport, based on Romney Marsh, to handle two million passengers by 2014.
Peter Carroll, from the Keep the Marsh Special Alliance, said Romney Marsh was an important environmental asset.
A spokesman for the airport, based at Lydd, said an "exhaustive study" was being conducted to ensure environmental impact would be minimised.
The airport has been holding a series of public consultations in Kent on the planned expansion.
The Keep the Marsh Special Alliance is holding it own public meeting in Greatstone-on-Sea, near Lydd, on Wednesday evening.
"We thought it was right that there should be at least one major public meeting which will tell the other side of the story," said Mr Carroll.
"The increased noise pollution, traffic congestion and destruction of the marsh will devastate the quality of life for local people."
He said the meeting will include a presentation on how local people could help fight the development.
The spokesman for London Ashford Airport said it was "very likely" one of the airport team would attend the meeting in Greatstone.
Airport facilities have already undergone a £15m upgrade.