Question: where is geothermal energy used the most in the us
[{'answer': 'California', 'provenance': [{'wikipedia_id': '11166187', 'title': 'Geothermal energy in the United States', 'start_paragraph_id': 1, 'start_character': 108, 'end_paragraph_id': 1, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11166187', 'title': 'Geothermal energy in the United States', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The Geysers in California was developed into what is now the largest geothermal steam electrical plant in the world, at 750 megawatts.', 'Geothermal energy in the United States was first used for electric power production in 1960. The Geysers in California was developed into what is now the largest geothermal steam electrical plant in the world, at 750 megawatts. Other geothermal steam fields are known in the western United States and Alaska. Geothermally-generated electric power can be dispatchable to follow the demands of changing loads. Environmenta', 'Geothermal energy in the United States was first used for electric power production in 1960. The Geysers in California was developed into what is now the largest geothermal steam electrical plant in the world, at 750 megawatts']}}]}]