Selectmen have adopted a state law that allows towns to lower health care costs by reevaluating and, if desired, changing the medical insurance plans offered to town employees, such as teachers and firefighters. Selectmen say the cost of health care is outpacing the town’s ability to fund it, and the flexibility created by the law enacted last year may be useful. Meanwhile, union representatives and employees have expressed concern that changes will stick them with steeper copayments and new deductibles. Any alterations to the town’s insurance plan would affect health care benefits for current and retired town employees. - Meg Murphy