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首页> 外文期刊>Landscape and Urban Planning >Reducing greenhouse gas emissions with urban agriculture: a Life Cycle Assessment perspective.
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Reducing greenhouse gas emissions with urban agriculture: a Life Cycle Assessment perspective.

机译：都市农业减少温室气体排放：生命周期评估的观点。

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摘要

The production and supply of food currently accounts for 20-30% of greenhouse gas (GHG) emissions in the UK and the government and nongovernmental organisations are seeking to reduce these environmental burdens. Local authorities all over UK establish community farms with the aim to produce more sustainable food for citizens. This study used environmental Life Cycle Assessment (LCA) to quantify the potential savings of food-related GHG emissions that may be achieved with the establishment of an urban community farm, based on a case study recently found in the London Borough of Sutton. The work identified elements of the farm design that require the greatest attention to maximise these savings. The greatest reductions can be achieved by selecting the right crops: (i) providing the highest yields in local conditions and (ii) usually produced in energy-intensive greenhouses or air-freighted to UK from outside Europe. Implications from further development of the farm on the local, unused land were examined, taking into account market requirements. This showed that land used on an urban fringe for food production could potentially reduce greenhouse gas emissions in Sutton by up to 34 t CO2e ha-1 a-1. Although the percentage of this reduction in total diet emissions is relatively low, the result exceeds carbon sequestration rates for the conventional urban green space projects, such as parks and forests.
机译：目前，食品的生产和供应占英国温室气体（GHG）排放量的20％至30％，政府和非政府组织正在寻求减轻这些环境负担。英国各地的地方当局都建立了社区农场，旨在为公民生产更多可持续的粮食。这项研究基于最近在萨顿伦敦自治市镇发现的案例研究，使用环境生命周期评估（LCA）量化了与建立城市社区农场相关的与食物相关的温室气体排放量的潜在节省量。这项工作确定了农场设计中需要最大关注以最大程度地节省这些成本的要素。选择合适的农作物可以最大程度地减少产量：（i）在当地条件下提供最高的产量，（ii）通常在能源密集型温室中生产或从欧洲以外的国家空运到英国。考虑到市场需求，研究了农场在当地未使用土地上进一步发展的影响。这表明，在城市边缘用于粮食生产的土地可能会减少萨顿的温室气体排放，最多可减少34 t CO 2 e ha -1 a - 1 。尽管减少的总膳食排放量所占的百分比相对较低，但结果超过了常规城市绿地项目（如公园和森林）的碳固存率。

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