ABSTRACT
What has pushed the carbon cycle into a state of crisis is, above all, the very large-scale use of fossil fuels by industrial economies, increasing the amount of carbon dioxide in the atmosphere and causing global warming. Industrial economies are taking carbon-based fossil fuels and transforming them from resources into pollutants. There are other elements of the crisis too: methane, which also contains carbon, contributes to global warming, as does the destruction of tropical rainforests which are at present massive stores of carbon.
