A company called Entocycle feeds brewery waste and old coffee grains to fly larvae to create a form of animal feed that doesn’t harm the environment. “Insects are nature’s perfect upcycling machines,” says founder Keiran Whitaker. “They create organic natural protein that we can feed to animals – and eventually humans.” At a time when animal feed based on soya and fishmeal is driving grassland and forest destruction, as well as fish-stock declines, could these nutritious insects offer a solution?