by that time co2 emissions had already risen from the expanded use  of coal that had powered the industrial revolution, and emissions only  increased slowly from 3.5gigatonnes in 1910 to under 4gigatonnes by the  end of the second world war.
by that time co2 emissions had already risen from the expanded use  of coal that had powered the industrial revolution, and emissions only  increased slowly from 3.5gigatonnes in 1910 to under 4gigatonnes by the  end of the second world war.
carbon dioxide in earth's atmosphere:149
in 2010, 9.14 gigatonnes of carbon (gtc, equivalent to 33.5 gigatonnes of co 2 or about 4.3 ppm in earth's atmosphere) were released from fossil fuels and cement production worldwide, compared to 6.15 gtc in 1990.