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Responding to criticisms that its ratings can be meaningless and easily gamed, the USGBC is introducing new rules so buildings must continually recertify and measure their energy use against their neighbors.

As of early April, the state-of-the-art T2 Terminal in San Francisco is the new home of American Airlines and Virgin America. In a $393 million renovation of the original 1954 terminal by Turner Construction and Gensler, architects recycled 90 percent of the original building content