The potential for land sparing to offset greenhouse gas emissions from agriculture
The potential for land sparing to offset greenhouse gas emissions from agriculture
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DOI：
10.1038/nclimate2910
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发表时间：
2016-05-01
影响因子：
30.7
通讯作者：
Balmford, Andrew
中科院分区：
文献类型：
--
作者：
Lamb, Anthony;Green, Rhys;Balmford, Andrew
全球农业的温室气体排放量正以每年约1%的速度增长，但所有部门都需要大幅减排。减少农业排放的挑战尤为严峻，因为通过改变耕作方式实现的减排量有限（2，3），并受到快速增长的粮食需求的阻碍（4，5）。在这里，我们评估了土地节约提供的技术缓解潜力--增加农业产量、减少农田面积并积极恢复闲置土地上的自然栖息地（6）。恢复的生境可以固碳，并可以抵消农业排放。以英国为例，我们估计在一系列未来农业情景下2050年的净排放量。我们发现，节约土地的战略有技术潜力，实现显着减少农业和土地利用变化的净排放量。将节约土地与减少肉类消费和食物浪费的需求方战略相结合，可以进一步增加技术缓解潜力，但是，经济和实施方面的考虑可能会限制这种技术潜力在实践中的实现程度。
Greenhouse gas emissions from global agriculture are increasing at around 1% per annum, yet substantial cuts in emissions are needed across all sectors(1). The challenge of reducing agricultural emissions is particularly acute, because the reductions achievable by changing farming practices are limited(2,3) and are hampered by rapidly rising food demand(4,5). Here we assess the technical mitigation potential offered by land sparing-increasing agricultural yields, reducing farmland area and actively restoring natural habitats on the land spared(6). Restored habitats can sequester carbon and can offset emissions from agriculture. Using the UK as an example, we estimate net emissions in 2050 under a range of future agricultural scenarios. We find that a land-sparing strategy has the technical potential to achieve significant reductions in net emissions from agriculture and land-use change. Coupling land sparing with demand-side strategies to reduce meat consumption and food waste can further increase the technical mitigation potential-however, economic and implementation considerations might limit the degree to which this technical potential could be realized in practice.