Natural gas is energy's new king — but how long will it reign? California may offer some clues

Natural gas is now the nation’s leading source of electricity. It is abundant and cheap, which has not only crippled the coal industry but has also impacted virtually every other source of power that makes up the energy grid. Some have estimated there is enough natural gas in the U.S. to meet the country’s energy needs for about 200 years. But “King Gas” has its critics — especially among environmentalists — and California’s fast-changing energy landscape offers hints that a long, smooth reign for natural gas is far from assured.

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