Firefighters and national chemical safety groups are praising Maine's new law banning flame retardants in furniture. Maine lawmakers this week overrode Republican Gov. Paul LePage's veto of a law that supporters said would reduce firefighters' exposure to carcinogens. Starting in 2019, a person can't sell upholstered furniture whose materials contain more than one percent of a flame-retardant chemical. The restrictions don't apply to used furniture. Furniture bought for use in schools, jails and hospital are also exempted, and instead have to go through safety tests.