When the Bank of America Tower opened in 2010, the press praised it as one of the world’s “most environmentally responsible high-rise office building[s].” It wasn’t just the waterless urinals, daylight dimming controls, and rainwater harvesting. And it wasn’t only the Leadership in Energy and Environmental Design (LEED) Platinum certification—the first ever for a skyscraper—and the $947,583 in incentives from the New York State Energy Research and Development Authority. It also had as a tenant the environmental movement’s biggest celebrity. The Bank of America Tower had Al Gore.

The former vice president wanted an office for his company, Generation Investment Management, that “represents the kind of innovation the firm is trying to advance,” his real-estate agent said at the time. The Bank of America Tower, a billion-dollar, 55-story crystal skyscraper on the northwest corner of Manhattan’s Bryant Park, seemed to fit the bill. It would be “the most sustainable in the country,” according to its developer Douglas Durst. At the Tower’s ribbon-cutting ceremony, Gore powwowed with Mayor Michael Bloomberg and praised the building as a model for fighting climate change. “I applaud the leadership of the mayor and all of those who helped make this possible,” he said.

Gore’s applause, however, was premature. According to data released by New York City last fall, the Bank of America Tower produces more greenhouse gases and uses more energy per square foot than any comparably sized office building in Manhattan. It uses more than twice as much energy per square foot as the 80-year-old Empire State Building. It also performs worse than the Goldman Sachs headquarters, maybe the most similar building in New York—and one with a lower LEED rating. It’s not just an embarrassment; it symbolizes a flaw at the heart of the effort to combat climate change.

Buildings contribute more to global warming than any other sector of the economy. In the United States, they consume more energy and produce more greenhouse gas emissions than every car, bus, jet, and train combined; and more, too, than every factory combined. When we’re not traveling between buildings, we’re inside them, and that requires energy for everything from construction to heating and cooling to running appliances.

The nonprofit U.S. Green Building Council (USGBC) unveiled LEED in 1998 as a way to measure a building’s environmental footprint. It has grown into the most popular certification system for green buildings, with some 50,000 buildings either certified or in the certification process globally. A stamp from LEED signals “green” to the public, and it’s good for more than just PR: Some certifications can be cashed in for tax credits. In fact, many cities, states, and federal agencies now require new buildings to work with LEED.