The obvious place to start is with electric utilities. Those burning coal would get the heaviest penalty. Those burning natural gas – the fuel favored by its low price and abundance in the nation -- some penalty, but not as heavy.

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Wind and solar resources are unique among sources of electricity. Unlike most other generating technologies, grid operators generally do not dispatch wind and solar generation because these generators produce electricity only when the associated resources are available.

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Natural gas prices have spiked over the last few weeks as U.S. inventories run low ahead of the peak winter heating season. Natural gas prices have jumped nearly 15 percent over the past month, rising to roughly $3.30 per million Btu (MMBtu). 

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Solar cell technologies need to fulfill three conditions to be worth commercializing: their conversion rate of sunlight into electricity must be high, they must be inexpensive to produce, and they must have a long lifespan.

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Natural gas from the United States more than doubled the average daily net exports during all of 2017. The United States has continued to export more natural gas than it imports for five of the first six months in 2018.

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According to EIA’s international electricity statistics, hydroelectric and fossil fuel-powered generation were the top sources of growth between 2005 and 2015. During that period, hydroelectric generation increased by about 40%, while fossil fuel-powered generation increased by 15%. 

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