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Severe drought in California is affecting the state’s hydropower resources, leading to a decrease in hydropower generation and an increase in other forms of more polluting types of electricity generation, such as natural gas. In 2019, hydropower provided approx 19% of California’s in-state electricity generation, dropping to 11% in 2020. The U.S. Energy Information Administration (EIA) predicts that figure will drop to 8% during the summer of 2022.
California’s largest reservoirs, Lake Shasta and Lake Oroville, are both at historically low levels, which has led to the reservoirs’ dams producing less electricity. As the drought continues through the summer, reservoir levels are expected to deplete further, requiring more harmful means of generation to come into prominence. The EIA predicts that natural gas will generate 50% of California’s electricity this summer, contributing emissions equivalent to 211,000 automobiles. In addition to the increased pollution, energy costs could increase by 5 to 7% across the state.
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