During the 1980s, the average emission of carbon from burning fossil fuels on Earth was 5.4 petagrams

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During the 1980s, the average emission of carbon from burning fossil fuels on Earth was 5.4 petagrams (Pg) of carbon per year in the form of CO2.4
(a) How many kg of C were placed in the atmosphere each year?
(b) How many kg of CO2 were placed in the atmosphere each year?
(c) A metric ton is 1 000 kg. How many metric tons of CO2 were placed in the atmosphere each year? If there were 5 billion people on Earth, how many tons of CO2 were produced for each person?
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