If students and staff at Goldsmiths University really want to help the environment, they should end their ban on selling beef on campus. Far from being the bogeymen portrayed by environmental campaigners, sustainably farmed beef and dairy cattle are integral to maintaining our green and pleasant land, keeping our waterways free of chemicals and feeding our population in the most efficient manner possible.

Two thirds of UK farmland is under grass and in most cases cannot be used for other crops. The only responsible way to convert this into food is to feed it to cattle, which are capable of deriving 100 per cent of their nutrition from grass and therefore are more efficient on such land than chickens or pigs. Even on grassland where crops could be grown, ploughing it up to create arable farms would release huge amounts of carbon into the atmosphere and require the use of pesticides, herbicides and fertiliser, all of which can devastate biodiversity.

Cattle farming does not just help to maintain grassland – it also works to improve the sustainability of existing cropland. During the “Green Revolution” after the Second World War, many farmers abandoned mixed farming and instead made the most of industrial chemicals, which enabled them to grow vast monocultures. They were undoubtedly right to do so, given the huge leaps in productivity that were made at a time when food supplies were tight. The world, though, is now beginning to count the cost of this advance.