期刊
NATURE CLIMATE CHANGE
卷 5, 期 5, 页码 481-486出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NCLIMATE2584
关键词
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资金
- Princeton Environmental Institute Development Grand Challenges Program
- David & Lucile Packard Foundation
- Norwegian Agency for Development Cooperation
- Gordon and Betty Moore Foundation
- CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) from the CGIAR Fund
- European Union [308371]
- Division Of Behavioral and Cognitive Sci
- Direct For Social, Behav & Economic Scie [1026334, 1026776] Funding Source: National Science Foundation
- Divn Of Social and Economic Sciences
- Direct For Social, Behav & Economic Scie [1360421] Funding Source: National Science Foundation
Do the wet savannahs and shrublands of Africa provide a large reserve of potential croplands to produce food staples or bioenergy with lowcarbon and biodiversity costs? We find that only small percentages of these lands have meaningful potential to be low-carbon sources of maize (similar to 2%) or soybeans (9.5-11.5%), meaning that their conversion would release at least one-third less carbon per ton of crop than released on average for the production of those crops on existing croplands. Factoring in land-use change, less than 1% is likely to produce cellulosic ethanol that would meet European standards for greenhouse gas reductions. Biodiversity effects of converting these lands are also likely to be significant as bird and mammal richness is comparable to that of the world's tropical forest regions. Our findings contrast with influential studies that assume these lands provide a large, low-environmental-cost cropland reserve.
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