I just looked it up: "the ban of neonicotinoids has meant growers can no longer control cabbage stem flea beetle populations, which are decimating the OSR crop across the country" (Farming UK)
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I used to have food-miles in mind when I chose rapeseed oil - taste-wise, I didn't find much difference (apart from olive oil which, of course, has a very distinctive taste, that I enjoy occasionally, as I do olives).