Energy policy is going wrong because we are accustomed to thinking within narrow national lines. Each individual country has to achieve whatever is the target of the moment – a 30 per cent cut in emissions; a 20 per cent share for renewables and so on. This is a suboptimal approach. Individual countries can achieve their targets but the costs of working in an atomistic way can be enormous. One of the greatest advances of a complex society is that different people do different things. We do not all grow or kill our own food every day.

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