As States Meet Renewable Energy Goals, They Must Decide Whether to Expand Them

Governing: State laws boosting wind and solar power have seen remarkable success over the past two decades.

But in the past couple of years, the role of renewable portfolio standards — state requirements for utilities to supply a minimum amount of retail electricity from renewable energy — has waned, according to a Lawrence Berkeley National Lab study. In some cases the use of renewables has grown even without mandates, but many environmental leaders contend they are still necessary to drive growth in the industry.

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