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Massachusetts utilities advanced two large offshore wind projects yesterday, fleshing out the growing network of planned turbines along the East Coast that could slash the region’s carbon emissions.

Electric utilities filed long-term plans with the state Department of Public Utilities to procure power from the two projects, which collectively represent the state’s largest offshore wind venture, officials said yesterday. The facilities — Commonwealth Wind and Mayflower Wind — would together add 1,600 megawatts of carbon-free power to New England’s power grid, enough to offset about 2.7 million metric tons of greenhouse gases per year, said Beth Card, secretary of energy and environmental affairs for the state.

“Combined with a previously procured offshore wind project, the commonwealth’s [utilities] have contracted for 3,200 megawatts of offshore wind,” Card said on a call with reporters. “This amount of energy will power nearly 1.7 million homes.”

Once commissioned later this decade, the two new facilities could help Massachusetts move toward its clean energy goals, which include a target of net-zero greenhouse gas emissions by 2050, Card added. They could also bolster the Biden administration’s goal of deploying 30 gigawatts of offshore wind energy by 2030.

[Miranda Willson]

More: Mass. advances two major offshore wind projects

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