How to reconcile needs, especially food needs, with the preservation of biodiversity? This is where the tumultuous scientific and political debates between land sparers and land sharers arise. Is it better to produce as much as possible on a minimum surface area, even if it means using methods that are harmful to the environment, in order to leave more space for nature? Or should we adopt less intense and more respectful environmental practices, with the risk of having to farm larger land areas?

The answer to this question, in defining what is the best way to farm, has huge implications on food sustainability trajectories, and on the policy choices that frame them.