(p.B1) . . . : Global carbon-dioxide emissions have stopped rising. Coal use in China may have peaked. The price of wind turbines and solar panels is plummeting, putting renewable energy within the reach of meager budgets in the developing world.
And yet as climate diplomats gather this week in Bonn, Germany, for the 23rd Conference of the Parties under the auspices of the United Nations Framework Convention on Climate Change, I would like to point their attention to a different, perhaps gloomier statistic: the world’s carbon intensity of energy.
(p. B2) The term refers to a measure of the amount of CO2 spewed into the air for each unit of energy consumed. It offers some bad news: It has not budged since that chilly autumn day in Kyoto 20 years ago. Even among the highly industrialized nations in the Organization for Economic Cooperation and Development, the carbon intensity of energy has declined by a paltry 4 percent since then, according to the International Energy Agency.
This statistic, alone, puts a big question mark over the strategies deployed around the world to replace fossil energy. In a nutshell:
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The most worrisome aspect about the all-out push for a future powered by renewables has to do with cost: The price of turbines and solar panels may be falling, but the cost of integrating these intermittent sources of energy — on when the wind blows and the sun shines; off when they don’t — is not. This alone will sharply curtail the climate benefits of renewable power.
Integrating renewable sources requires vast investments in electricity transmission — to move power from intermittently windy and sunny places to places where power is consumed. It requires maintaining a backstop of idle plants that burn fossil fuel, for the times when there is no wind or sun to be had. It requires investing in power-storage systems at a large scale.
For the full commentary, see:
EDUARDO PORTER. “Why Slashing Nuclear Power May Backfire.” The New York Times (Weds., NOV. 8, 2017): B1-B2.
(Note: ellipses added.)
(Note: the online version of the commentary has the date NOV. 7, 2017, and has the title “Wind and Solar Power Advance, but Carbon Refuses to Retreat.”)