Lean, green, mean, obscene…? What is efficiency? And is it sustainable?
We all know that the food system today is undermining the environment upon which future food production depends. But while we generally agree that we need do something to make food systems more sustainable, we do not necessarily agree about what, exactly, should be done. This paper explores these questions by considering how stakeholders think about efficiency in relation to animal production and consumption, both terrestrial and aquatic. It takes as its starting point three broadly discernible views.