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Figure 2.6 Changes in atmospheric CO2 (ppmv: parts per million by volume) and estimates of the resulting global temperature deviations from the present value obtained from air trapped in ice bubbles in cores at Vostok, Antarctica.

Source: Our Future World, Natural Environment Research Council (NERC) (1989).

Mean

A Release

Natural wetlands 115

Rice paddies 110

Enteric fermentation 80

(mammals)

Gas drilling 45

Biomass burning 40

Termites 40

Landfills 40

Total c. 530

B Consumption

Soils 30

Reaction with OH 500

Total c. 530

Source: Tetlow-Smith 1995.

Range

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