Carbon reservoirs hold large amounts of carbon in between transformations. Which carbon reservoirs have humans depleted by burning the products in that reservoir?

Carbon reservoirs hold large amounts of carbon in between transformations.

Fossil Fuels is one of the carbon reservoirs that humans have depleted by burning the products in that reservoir.         

Therefore we can conclude that the Carbon reservoirs like fossil fuels have been burned by humans.

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Sediment

Explanation:

The world carbon reservoirs are the atmosphere, the terrestrial biosphere, oceans, and the sediments. However, the carbon reservoirs that humans have depleted by burning its products in that reservoir is SEDIMENTS, and the product is FOSSIL FUELS. The burning of Fossil Fuels is evident in the burning of Coal, Oil, and Natural Gas.

However, this burning activity often leads to the generation of huge amounts of carbon dioxide whereby carbon emissions catch heat in the atmosphere and cause climatic alteration.