Juggling with constant change Research ETH Zurich A cultural landscape reflects the combined activity of nature and humans. Where has the equilibrium of this union been lost? And how can we restore the balance? Updating the self-sufficiency ratio Research ETH Zurich The level of self-sufficiency indicates the extent to which agricultural performance ensures food security. But it’s not geared to the challenges that confront agriculture today, says Roman Hüppi. Previous 33 34 35 36 37 38 39 40 Page 40 of 40
