When the Navajo Generating Station in Arizona shuts down later this year, it will be one of the largest carbon emitters to ever close in American history.
The giant coal plant on Arizona’s high desert emitted almost 135 million metric tons of carbon dioxide between 2010 and 2017, according to an E&E News review of federal figures.
Its average annual emissions over that period are roughly equivalent to what 3.3 million passenger cars would pump into the atmosphere in a single year. Of all the coal plants to be retired in the United States in recent years, none has emitted more.
The Navajo Generating Station isn’t alone. It’s among a new wave of super-polluters headed for the scrap heap. Bruce Mansfield, a massive coal plant in Pennsylvania, emitted nearly 123 million tons between 2010 and 2017. It, too, will be retired by year’s end (Energywire, Aug. 12).
And in western Kentucky, the Paradise plant emitted some 102 million tons of carbon over that period. The Tennessee Valley Authority closed two of Paradise’s three units in 2017. It will close the last one next year (Greenwire, Feb. 14).
“It’s just the economics keep moving in a direction that favors natural gas and renewables. Five years ago, it was about the older coal plants becoming uneconomic,” said Dan Bakal, senior director of electric power at Ceres, which works with businesses to transition to clean energy. “Now, it’s becoming about every coal unit, and it’s a question of how long they can survive.”..
There’s also this: The vast majority of super-polluters have no closure date in sight. That’s because massive coal plants generally benefit from large economies of scale. Because they crank out power around the clock, their cost of generating electricity is relatively cheap.
“The coal plants remaining have generally installed all the environmental controls,” Larsen said. “There are no additional regulatory threats, or they are cost-effective in a world where gas is $2.50 per MMBtu.”
19 August 2019
Coal-powered energy plants continue to close
As reported by Scientific American: