 A final objection to the permissibility of plant production: There are clearly environmental costs of plant production. Indeed, the environmental costs of plant farming are large: topsoil loss; erosion; deforestation; run-off; resource-depletion; greenhouse gas emissions. To take just the last two examples, Budolfson (2016: 169) estimates that broccoli produces more kilograms of CO2 per thousand calories than pork and that almonds use two and a half times the water per thousand calories that chicken does.