The owners of the Empire State Building have spent $120 million to make the skyscraper more environmentally friendly as part of an effort to attract tenants. And others are doing the same. Meanwhile, many renovation experts in the U.S. are turning their attention to older buildings and adding water-efficient plumbing, reflective cool roofs, wind turbines and other green features. Experts also say green-certified buildings have commanded higher rents over the past few years.
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