Faced with growing demand for consistency in building rating systems, the U.S. Green Building Council (USGBC) has agreed to team up with its Australian and British counterparts to develop a common metric to measure emissions of carbon dioxide from new homes and buildings. The USGBC signed a memorandum of understanding on March 3 with the U.K. Green Building Council, the Green Building Council of Australia, and United Kingdom-based BRE Global Ltd. A working group representing each of the rating systems will seek to align the tools to provide consistency in measurement and reporting. Paul King, chief executive of the U.K. Green Building Council, says that by joining efforts, the four organizations will “help create an international language that will enable us to talk with one voice.”