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Located in the western region of the United States, the state of California is the most populous state and the third-largest — it includes some of the most populated cities of the country such as Los Angeles, San Diego, San Francisco, Long Beach and Oakland.
The California Building Standards Commission has approved a new rule starting in 2020 that requires all new homes built in the state to include solar panels. As the first of its kind in the United States, the new rule includes an incentive for homeowners to add a high-capacity battery to their electrical system. The move hopes to help meet the state's goal of sharply reducing greenhouse gas emissions while drawing all electricity from renewable energy sources.
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