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The WEO report, yet again, projects that global fossil fuel use — and related emissions — will grow out to 2040, as oil, gas and coal continue to dominate the energy picture. But it also struggles to put a positive spin on wind and solar. Solar had a “record-setting” year in 2017. The Chinese solar business is “booming.” New wind and solar additions “outpaced those of fossil fuels in 2017, driven by policy support and declining costs.

“Policy support” means subsidies worth hundreds of millions of dollars. As for declining costs, solar is at least twice as expensive a generator as coal and almost twice as expensive as gas.

Finally, and most significantly, the report confirms what should have been obvious from the start: the more “variable” wind and solar are introduced into any electricity system, the more they make it both more expensive and less reliable.

The term Variable Renewable Energy, VRE, could more accurately be described as Unreliable Renewable Energy, URE, due to the terribly obvious fact that the sun doesn’t shine at night, and sometimes not during the day either, while the wind doesn’t always blow. Thus the more that wind and solar are part of your system, the more technical contortions they demand from backup power and the structure of the grid. The efficient part of the system has to twist itself into a technical pretzel to accommodate the inefficient part. Accommodating unreliability has led to outright perversity. The widespread adoption of wind and solar under Germany’s Energiewende (“energy transition”) has resulted in rising overall emissions, mainly from coal-fired backup facilities. Meanwhile the green Godot is battery storage, which is always on the point of turning up, but never quite does. Still, the IEA has a scenario for that: “What if battery storage becomes really cheap?”