Can someone please explain, in very simple language, how growing almonds in a Californian desert, draining the local aquifer until the ground subsides, spraying the entire crop with fungicides because almonds can't survive without them, killing off the commercial bee population in the process, then refrigerating the harvest and shipping it six thousand miles to Britain is environmentally friendly, but buying a piece of beef from a farmer twelve miles down the road, whose cattle eat the grass that grows in the rain that falls on the hills that have been there since before anyone had opinions about this, is a planetary emergency? Asking for the cow.