Discussion
Human activities add 7-9 gigatons of CO\(_{2}\) per annum into the atmosphere. Major contributor to this CO\(_{2}\) is
Answer: A
Burning of fossil fuels is the major contributor to the 7-9 gigatons of CO2 that human activities add to the atmosphere each year. Coal, oil and gas combustion for power, transport and industry accounts for the large majority of the anthropogenic emissions. Clearing forests for agriculture is the second-largest source, but it is much smaller. Fermentation and cement manufacture also release CO2, but in small amounts compared with fossil fuel burning.
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