|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 being added to the atmosphere from fossil fuel burning.
converting some land to different uses
adding another 1.7 billion tonnes to the atmosphere.
ecosystems and oceans each absorb 1.9 billion tonnes.
|The net addition
to the atmosphere is 3.3 billion tonnes.