A new group is working to stop clear cut logging in the Pioneer Valley's biggest area of protected open space. The activists want to do that by persuading politicians to convert the 87,000 acre Quabbin state forest into a national park. Of that area, 58,000 acres is land, the rest is water. Stopping logging on the land would make it more profitable for logging companies to buy forestland that might otherwise be turned into houses, roads, Walmarts, and parking lots. Logging companies can be required to log sustainably, not using clear cut logging. This kind of rule exists in Vermont.