Maine city advances 100% clean energy by 2040 mandate

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If Portland, Maine successfully implements this mandate, it will  be the 27th US city to take the 100% renewables pledge. Source: Flickr/Don Shall

Portland, Maine, is the latest city in the US to pursue a 100% clean energy mandate – aiming to be entirely renewable by 2040.

City councillor Spencer Thibodeau, chairman of Portland’s sustainability and transportation committee, is to present the target as a council resolution, to be discussed at the next committee meeting tomorrow.

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To meet the ambitious goal, the committee plans to amend the city’s 2008 Municipal Climate Action Plan to accelerate Portland’s renewable energy capacity to meet the 2040 goal.

The goal would place Portland among a growing number of US communities that are leading efforts to reduce fossil fuel use that contributes to climate change and other environmental issues.

Most recently, Portland in Oregon made the pledge for 100% renewable energy by 2050. If Portland, Maine successfully implements the mandate, it will be the 27th US city to announce a 100% clean energy mandate, following St. Petersburg in Florida, and Los Angeles, California.

In other news, Chicago has pledged 100% renewables for all its public buildings by 2025 – becoming the first US city to do so.

13 October 2026
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 13-14 October 2026 is our fourth PV CellTech conference dedicated to solar manufacturing in the USA. From polysilicon, wafers, ingots, cells and modules, to critical component suppliers including glass and frames, the event connects every stage of the value chain under one roof. PV CellTech USA also brings together investors, innovators, manufacturers and industry stakeholders to collaborate and strengthen domestic solar manufacturing across the United States.

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