Climate Change 2001:
Working Group III: Mitigation
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Figure 4.9: Indicative curves of costs (US$/tC, cost of US$28/tC is equivalent to US$100 per tonne of CO2) of emission reduction or carbon sequestration by level of total reduction. The curves display how comparable options vary in costs between world regions. However, costs per option are also reported to vary widely at comparable total levels of reduction. This is mainly because cost studies have not been carried out in the same way. In some options net monetary profit may occur as well (i.e., costs may be negative as well) (Brown et al., 1996a, Hol et al., 1999; Jepma et al., 1997; Sedjo et al., 1995).

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