The nation's
production of Portland
cement — the most commonly produced
cement type — amounted to about 80.4 million tons in 2015, according to the
U.S. Geological Survey, or roughly the weight of about 90 Golden Gate Bridges or 12 Hoover Dams.
Under allocation schemes based on current annual CO2 emissions from fossil fuels and
cement production, China leads the pack, followed by the
U.S. and India (a).