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journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third part...
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Context 1
... They are predominantly of methane (CH 4 ) and nitrous oxide (N 2 O), which are 21 and 310 times more powerful, respectively, than CO 2 as regards their greenhouse warming effect (IPCC, 2007). Globally, agriculture's share (excluding emissions from fertilizer production) of total anthropogenic GHG emissions was about 13% in the mid-2000s (Fig. 1) compared with 9% in the UK (MacCarthy et al., 2011) and 15-19% in China (SAIN, 2010). Moreover, CH 4 and N 2 O emissions are projected to grow by 30-60% by 2030 even under relatively favourable policy and technological assumptions (Bruinsma, 2003), and the bulk of this growth will be in developing ...
Context 2
... share of total global anthropogenic GHG emissions in 2005 (excluding those associated with the production of fertilizers and other agro-chemicals) was about 13% (Fig. 1), and similar to that of the transport sector, but only about half of the energy supply sector (IPCC, 2007). The distribution around this mean is considerable. It ranges from 1% to 2% in some developing countries such as Tanzania and Madagascar with low C intensity farming systems to 15-19% in China with very intensive cropping systems ...
Context 3
... the term C sequestration tends to be used quite broadly and does not necessarily result in a net transfer of C from the atmosphere to the land (Powlson et al., 2011). Consequently, for example, some of the earlier estimates of the gains from reduced tillage were too high (including some by the author). ...
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