|This subset of
the cycle quantifies carbon input from fossil fuels and land use changes. It
is called the human perturbation by
|It shows 5.3
billion tonnes added to the atmosphere annually from fossil fuel use.
converting some land to new uses adding another 1.7 billion tonnes to the
ecosystems and oceans each absorb 1.9 billion tonnes.
|The net addition
to the atmosphere is 3.3 billion tonnes.