The Open Spaces Society has made a last-minute call to South Yorkshire communities to apply to register land as town or village greens.
The government’s Growth and Infrastructure Bill, currently in the House of Lords, is set to prevent land being designated as greens in the future as part of measures to boost economic development.
But Kate Ashbrook, general secretary of the Open Spaces Society, said: “The bill could become law within three months, and then it will be too late to save land we love.
“People’s New Year resolution must be to look around your patch and see if there is unprotected land which residents have used for 20 years for dog walking, bird watching or kicking a ball.
“Provided an application is made to a council before the bill becomes law, the authority will process it.”
Once registered, land designated as a green is protected from development.