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The Carbon Cycle
Carbon dioxide is the most available form of carbon for living organisms and the process by which it is cycled around the ecosystem, quickly or over million years is called the carbon cycle. Although the amount of carbon dioxide we emit increases year by year, the rate at which the gas accumulates in the atmosphere has slowed. The increase in carbon dioxide has been caused by many factors, but principally through the burning of fossil fuels in power plants, factories and cars, and the manufacture of cement. Between them, these account for approximately 80 per cent of the 10 billion tons of carbon we release into the atmosphere each year.