Turtles all the way down
Bruno Prior
Green technology evangelists argue that solar electricity will continue to experience exponential learning curves forever. Experience of other technologies that experienced similar learning curves at an earlier date (under the UK's first support mechanism: NFFO) is that they eventually stop - things do not keep getting cheaper forever. The evangelists rely on absurd assumptions to make this case: if solar capacity doubles 5 times from here as they envisage, it will be 2.5X more than total generating capacity of all technologies in the world at present!

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