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U.S. Power Supply Is Changing Significantly

And the shifts in energy sources may be sharper than you think

Jan Willem Tulp; Source: Lawrence Livemore National Laboratory (data)

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It can be tricky to resolve different tales that are told about which U.S. energy sources are growing or fading. But now we have hard numbers. Annual flowcharts from Lawrence Livermore National Laboratory show that over the past decade, wind power has increased 396 percent and solar power is up 956 percent. Of course, a very small share can rise by many percentage points and still be small, but that traditional narrative about wind and solar is nearly over: together they now provide 3.48 quads (quadrillion BTU) of electricity—more than hydropower. The natural gas story is clearer, too: it has not surged “recently” but rather has grown steadily for 10 years, and this trend is the main cause of a continual decrease in coal consumption. If these trends persist, says A. J. Simon, Livermore's energy group leader, “we can expect our energy economy to continue to get cleaner.”

Credit: Jan Willem Tulp; Source: Lawrence Livemore National Laboratory (data)

Editor’s Note: This article was revised after posting to correct the online version of the illustration. The labels for “Energy lost” and “Energy put to use” had been misplaced.

Mark Fischetti was a senior editor at Scientific American for nearly 20 years and covered sustainability issues, including climate, environment, energy, and more. He assigned and edited feature articles and news by journalists and scientists and also wrote in those formats. He was founding managing editor of two spin-off magazines: Scientific American Mind and Scientific American Earth 3.0. His 2001 article “Drowning New Orleans” predicted the widespread disaster that a storm like Hurricane Katrina would impose on the city. Fischetti has written as a freelancer for the New York Times, Sports Illustrated, Smithsonian and many other outlets. He co-authored the book Weaving the Web with Tim Berners-Lee, inventor of the World Wide Web, which tells the real story of how the Web was created. He also co-authored The New Killer Diseases with microbiologist Elinor Levy. Fischetti has a physics degree and has twice served as Attaway Fellow in Civic Culture at Centenary College of Louisiana, which awarded him an honorary doctorate. In 2021 he received the American Geophysical Union’s Robert C. Cowen Award for Sustained Achievement in Science Journalism. He has appeared on NBC’s Meet the Press, CNN, the History Channel, NPR News and many radio stations.

More by Mark Fischetti

Jan Willem Tulp is an independent data experience designer from The Netherlands. He designs creative data visualizations for a wide variety of clients. You can find his work at http://tulpinteractive.com.

More by Jan Willem Tulp
Scientific American Magazine Vol 321 Issue 4This article was published with the title “Cleaning Up” in Scientific American Magazine Vol. 321 No. 4 (), p. 80
doi:10.1038/scientificamerican1019-80

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