What is profitable is not necessarily edible; food doesn't get along well with assembly lines, farm-chemical runoff and antibiotics. Its quality deteriorates, as do the soils from which it springs and the health of those to whom it is dished out.
Climate change is the highest-ranking risk the world will face in the coming years, but what's even more important is the interconnections between climate change and the other top risks, from economic disparity to geopolitical crises.
Food prices have already sparked riots in Algeria and mass protests in Tunisia. We haven't seen the last of resource revolts which, in the coming years, could reach an intensity we scarcely imagine today.