World-class environmental consulting, non-profit, design, and construction partners, including the Clinton Climate Initiative (CCI), Rocky Mountain Institute (RMI), Johnson Controls Inc., and Jones Lang LaSalle, have partnered to create a process for analyzing and retrofitting existing structures for environmental sustainability, and the process will be used to help the Empire State Building go green. Initially costing about $20 million itself, the retrofit project is part of a larger, $500 million renovation presently underway at the Empire State Building. Work has already commenced, and despite the hefty initial costs, the retrofit is expected to save the building $4.4 million in energy costs annually and reduce its energy consumption by close to 40 percent, in addition to cutting its overall carbon footprint. Commercial and residential buildings account for over 70 percent of New York City's carbon footprint.