Governors in Vermont and Maine signed bills on Monday that will ban plastic bags in their states next year, The Hill reported.

The Maine ban will go into effect next Earth Day, April 22, 2020. The Vermont ban, which extends beyond plastic bags and is the most comprehensive plastics ban so far, will go into effect in July 2020. The wait time is designed to give businesses time to adjust to the ban.

Gov. Janet Mills signed the Maine bill early Monday morning, making Maine the fourth state to ban single-use plastic bags after California, Hawaii and New York.