Once food gets into our fridges, larders and kitchens, ensuring that it gets used up before going off seems like an obvious thing to do - but it's alarming how many millions of tonnes are simply chucked because we don't keep track of the food we've spent our money on.

A hunk of beef raised on Scottish moorland has a very different ecological footprint from one created in an intensive feedlot using concentrated cereal feed, and a wild venison or rabbit casserole is arguably greener than a vegetable curry.

Vegetarians have been around for a very long time - Pythagoreans forbade eating animals more than 2,500 years ago - but even as the environmental evidence mounted, they didn't appear to be winning the argument.

Tristram Stuart Quotes