According to a new survey released by the U.S. Green Building Council (USGBC), 80% of companies are relying on LEED to guide its corporate sustainability. The study looked at Fortune 200 companies, most of them users of LEED and members of USGBC.

“We launched LEED 15 years ago so that the world’s leading businesses would have a tool that would deliver the immediate, measureable results they need to prove that what is good for the environment is also good for the bottom line,” said Rick Fedrizzi, CEO and founding chair of USGBC. “This survey demonstrates how successful we’ve been in helping link profit to planet and why LEED continues to be the market leader, certifying 1.85 million sq ft of commercial space every day.”