By Emmett Gartner

June 27, 2025

Legislation signed by Gov. Janet Mills this month codifies and fast-tracks Maine’s transition to 100 percent clean energy amid growing uncertainty about the future of federal tax credits for renewable energy projects. The law, L.D. 1868, advances Maine’s previous energy goals by a decade. It requires the state to transition its energy portfolio to 90 percent renewable sources and 10 percent low- or zero-carbon sources by 2040. In 2023, roughly 65 percent of the energy generated in Maine came from renewable sources.

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