A coalition of 19 U.S. mayors have joined together with C40, a group dedicated to climate action. The coalition has proposed a plan to ensure that all new buildings be net-zero by 2030. The cities are joining forces with the World Green Building Council (WorldGBC) to achieve their emissions goals. All cities in C40 have signed the pledge to ensure new buildings will be required to produce as much energy as they consume by 2030. The initiative is part of a larger plan to make all buildings net-zero by 2050.