Crop‐based biofuels and associated environmental concerns
Crop‐based biofuels and associated environmental concerns
复制标题
基于农作物的生物燃料和相关的环境问题
DOI：
10.1111/j.1757-1707.2012.01182.x
复制
发表时间：
2012
期刊：
影响因子：
5.6
通讯作者：
T. Searchinger
中科院分区：
文献类型：
--
作者：
Keith A. Smith;T. Searchinger
目前的生命周期分析（LCA）模型表明，与化石燃料相比，基于作物的生物燃料可以节省温室气体。我们认为，他们这样做只是因为他们忽略了二氧化碳的排放量从车辆燃烧的生物燃料没有确定是否生物质是“额外的”，因为他们低估了最终排放的N2O从氮肥的使用。如果适当考虑这些因素，就会得出截然不同的结论。从生物质中获得生物燃料要好得多，从废弃的原料或高产的生物能源作物中获得低氮需求，在目前不生产的土地上种植。
Current Life Cycle Analysis (LCA) models indicate that crop‐based biofuels generate greenhouse gas savings, compared with fossil fuels. We argue that they do so only because they ignore the emissions of CO2 from vehicles burning the biofuels without determining if the biomass is “additional,” and because they underestimate the ultimate emissions of N2O from nitrogen fertiliser use. Taking proper account of these factors would result in very different findings. It would be far better to derive biofuels from biomass, from waste feedstocks or high‐yielding bioenergy crops with low nitrogen demand, grown on currently unproductive land.