Some residents are asking voters to lower the tax burden on Norwell residents by reducing or canceling the Community Preservation Act surcharge. In 2002, residents approved participation in the state act, which involves a 3 percent surcharge on property tax to raise money for historic preservation, recreation, affordable housing, and open space, with money supplemented by the state. At the May 6 Town Meeting, residents will vote on two proposals: one to eliminate the surcharge, and the other to reduce it to 1 percent. If either is approved, it must also be approved in a town election. Norwell’s preservation fund has nearly $6 million, but $2.9 million would be needed for an athletic fields project that will come before residents in the fall.