Construction is the second largest carbon emitter in the U.S. At 16.6% of the total U.S. carbon footprint that is warming our planet, 80% of construction is due to population growth. At 1,211 mmt/year, the U.S. construction industry emits more CO2e than the total emissions of 98% of the world’s countries. Population growth is 80% of the reason for construction in the U.S.