Theoretically, anything that has energy can be turned into food. We can turn sunlight into electricity, and I'm certain that we can change it back as well, if w

Theoretically, anything that has energy can be turned into food. We can turn sunlight into electricity, and I'm certain that we can change it back as well, if we are desperate enough. At the end of the day, food is a complex set of molecules that were created from a basic set of elements through a process that uses energy. Perhaps some centuries in the future most of the energy for food production will not come from the sun but something like a nuclear reactor, using as a source uranium (or whatever) harvested from an asteroid. I strongly believe that science has more than enough power to produce as much food as is demanded. The reason we don't see more of that now is because most of science is funded by people who don't need more food. If food was on average 100x as expensive as it is right now, I'm sure we would see a much bigger proportion of our intellectual activity going towards the creation of cheaper food. And I'm also sure that we would find a way to make it cheaper.