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The trouble is renewable energy production isn鈥檛 profitable without subsidies, so why would any company just spend money (鈥溾��, 3 June)? Government is stuck because of increasing resistance to escalating energy bills when for voters there is no tangible benefit. The Green Deal is a slightly better idea in that the cost has to be equal to or less than the money savings. But is that really an incentive when your house effectively has a legal charge put on it? You don鈥檛 actually benefit because the cost savings are diverted to the loan repayment. Why bother?

Christopher Calcroft, via www.building.co.uk