U.N. Expert: Renewable Energy Not Necessarily "Green"

"Renewable and nuclear heresies" is the name of the paper written by Jesse Ausubel, Director, Program for the Human Environment for the Rockefeller University in New York.

Ausubel was one of the main organizers of the first UN World Climate Conference (Geneva, 1979), which substantially elevated the global warming issue on scientific and political agendas. During 1979-1981 he led the Climate Task of the Resources and Environment Program of the International Institute for Applied Systems Analysis, near Vienna, Austria, an East-West think-tank created by the U.S. and Soviet academies of sciences.

He's as green as it gets. And he says the focus on renewable energy is all wrong.

Renewable does not mean green, he states, and goes on to explain that building enough wind farms, damming enough rivers, and growing enough biomass to meet global energy demands will wreck the environment.

Ausubel has analyzed the amount of energy that each so-called renewable source can produce in terms of Watts of power output per square meter of land disturbed. He also compares the destruction of nature by renewables with the demand for space of nuclear power. "Nuclear energy is green," he claims, "Considered in Watts per square meter, nuclear has astronomical advantages over its competitors."

On this basis, he argues that technologies succeed when economies of scale form part of their evolution. No economies of scale benefit renewables. More renewable kilowatts require more land in a constant or even worsening ratio, because land good for wind, hydropower, biomass, or solar power may get used first.

Scientific Blogging, July 24, 2007