In an earlier post, I wondered whether there were data on the relative carbon efficiency of agricultural production in Europe versus third countries. A recent FAO study arising from a collaborative effort by FAO and the International Dairy Federation which assesses GHG emissions from the dairy food chain throws light on this. The study uses a Life Cycle Analysis (LCA) approach, and thus includes the land use change induced by the consumption of feed (principally soybeans) in intensive dairy systems.
The results are unambiguous:
… Read the rest“A global trend emerging from the results is the lower level of emissions per unit of product in intensive compared to extensive systems. This is mainly driven by two factors: the higher digestibility of the animals’ feed, and the higher milk productivity level… However, it is possible that production systems in industrialised countries will experience increasing emissions with intensification, as the marginal reductions in emissions from enteric fermentation may not compensate for the increased emissions from manure, fossil energy and other inputs.”

