[identity profile] alitheapipkin.livejournal.com 2011-07-22 01:45 pm (UTC)(link)
Dairy farms are increasingly using imported feeds as they get more intensive but sheep rearing is still low impact in this country. But yeah, as I commented below, this analyis is based on US agriculture which is very different to ours (although we do import a lot of lamb from New Zealand, which has a higher impact).