It's pretty easy to turn energy into food, in large quantities in small areas, even in incredibly hostile environments. (AKA greenhouses). We don't do so only because food and arable land is so incredibly cheap that it's not worth it.
Farming is only 0.07% of the US economy. A small increase in food prices would vastly increase supply. Africa would probably be screwed, but that would have nothing to do with our ability to feed them and be solely due to economics not making it profitable.
> Is farming 0.07% of the US economy or of the US workforce?
0.07% of GDP. It's a higher percentage of workforce, but still under 1% directly employed. Land area is irrelevant to my argument -- greenhouses can feed a lot of people in a small area.
> There were bread and rice riots around the globe just 10 years ago.
All that says is that Capitalism does a really bad job of supplying stuff to people without any money.
Farming is only 0.07% of the US economy. A small increase in food prices would vastly increase supply. Africa would probably be screwed, but that would have nothing to do with our ability to feed them and be solely due to economics not making it profitable.