Gas leaks are killing trees in Massachusetts, the co-founder of the Massachusetts Shade Tree Trust told the Boston Globe. Bob Ackley, a gas-line specialist who started the organization, said the Massachusetts communities of Newton, Quincy, Brookline, Hingham, Saugus, Milton, Nahant, Lynn and Revere are working with the Trust to identify tree damage from gas leaks. In Quincy, where Ackley estimated gas leaks caused more than $850,000 in damage to trees, City Council President Kevin Coughlin said he began to recognize the problem when his constituents reported smelling gas and would then report damage to their trees. Coughlin said the trees are assets to Quincy, and National Grid needs to repair its infrastructure and make the cities and towns whole for any damage caused by gas leaks. "These are taxpayer dollars that fund the planting of these trees," Coughlin said.