TORONTO - Municipal leaders from communities in the Ontario Greenbelt are calling on the leaders of the main provincial parties to let voters know where they stand on greenspace.

A letter to the Liberal, Progressive Conservative, NDP and Green leaders asks them to state if they will commit to strengthening the Greenbelt.

The Greenbelt helps protects nearly 730,000 hectares of prime farmland, comprising about 7,000 farms, and greenspace around the Greater Golden Horseshoe.

A poll commissioned by the Ontario Greenbelt Alliance indicates residents support strengthening the Greenbelt.

The Angus Reid poll found 70 per cent of Ontarians favour strengthening the Greenbelt to protect greenspace and agricultural land versus 15 per cent who support lessening protections.

Ontario's Greenbelt policy is to be reviewed in 2015. Greenbelt advocates say the government elected in October will be important to the future of the Greenbelt and say it's important for voters to know where the parties stand.