Environmental regulators in Maine have voted to ban a controversial plastics additive from containers used by children, but the measure must be approved by the state legislature. The state Board of Environmental Protection voted to phase out bisphenol-A (BPA), an additive commonly found in the linings of food and beverage cans, although the measure would apply only to baby bottles and sippy cups. BPA has been the subject of a long-running controversy after some scientific studies appeared to link it to cancer and reproductive disorders. If Maine follows through on the ban, it would become the ninth state to ban BPA from children’s drinking containers.