"Sixteen of the world’s biggest cities, five banks and one former president have pledged to invest billions of dollars to cut urban energy use" and ease global warming… "Participating banks would provide up to $1 billion each in loans that cities or private landlords would use to upgrade heating, cooling and lighting systems in older buildings." Savings accrued through reduced energy costs, typically 20–50 percent, could be used to pay the money back. (NY Times)

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