Worse still, New York is backing the wrong horse by looking to solar and wind energy as credible replacements for fossil fuels. The most powerful demonstration of this point comes from Mark Mills of the Manhattan Institute, who shows in painful detail that the technical limitations of both wind and solar power make them at best niche players. There is little chance that wind and solar energy can displace fossil fuels, which at present account for about 80 percent of the world’s energy sources.