the metroregion s large architectural and engineering community overall accounted for more than jobs in including more than leedcertified experts in the city of chicago alone there are currently members of the chicago chapter of the us green building council usgbc energyrelated activities account for the secondlargest share of the green sector and include nuclear energy biofuelsbiomass wind battery technologies smart grid solar photovoltaic renewable energy services solar thermal geothermal and fuel cells