National Grid and Eversource, Massachusetts’ largest investor-owned gas and electric utility companies, were the highest-spending energy companies on lobbying in the state over the first half of this year, while Shell Oil, NextEra and several offshore wind developers also spent big.

The lobbying data sheds light on the political influence, broad agreements and simmering tensions that underlie Massachusetts’ climate and energy policy.

A wide range of organizations representing industry, environmental and labor interests also lobbied in favor of the bill, including National Grid, the Environmental League of Massachusetts, the Union of Concerned Scientists, Acadia Center and the North Atlantic States Regional Council of Carpenters.

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