LEED v4, the newest version of the LEED green building program from the USGBC, was officially launched today, November 20, at the annual Greenbuild International Conference and Expo in Philadelphia.
LEED was first launched in 1998, and LEED v4 builds on the fundamentals of previous versions while offering a new system that prepares all LEED projects in a portfolio to perform at a higher level, said organization officials.