More states are requiring schools and government buildings to use environmentally friendly cleaning products, raising debate about their costs and benefits.

After a burst of legislation last year, 10 states including Connecticut, Illinois and New York require or encourage “green” floor waxes, window cleaners and other products in schools, according to Green Seal Inc., a nonprofit that certifies the products. Similar bills are expected to be debated this year in at least five states.

Critics say that while the measures are laudable, states should not mandate which products schools and agencies must buy, especially if they increase costs for governments that are struggling financially.

But supporters say the laws protect the environment and reduce the use of harsh chemicals that can harm workers’ and children’s health.

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