But food sustainability — even in this simple example — is a much more complex subject. In short, it’s not just about the food.
First, there’s the question of farming practices. In order for farmers to be able to survive, food production needs to be profitable. This means that the shift to sustainable farming should try to maintain or increase output while addressing environmental demands.
How is this done? The current wisdom argues that if we understand the ecosystem in which we’re farming, we can better understand what grows naturally there, reducing the need for intervention and making farming more sustainable in terms of both the economics and the environmental impact. Do this, and you can maintain yields while avoiding monocrops, keeping soil fertile, and protecting biodiversity.