Feeding grain to farm animals may cost $1.3tn a year by 2050
According to environmental campaigners, feeding foods consumed by humans, such as grain and soya, to farm animals will cost around $1.32 trillion a year by 2050 globally. They added that for every 100 calories of human edible cereals fed to farm animals, just 17-30 calories enter the human food chain as milk or meat.