I read the plan from the UN on how to solve world hunger and it basically was 'keep giving us billions a year so we can buy more food' which is idiotic and in violation of the 'give a man a fish, teach a man to fish'
What I have been considering, I wish I could entrepreneur and try this.
Could there be a fully automated system in which produces food? Sure I've literally been to greenhouses that didn't need humans in a day2day fashion anyway. But this greenhouse was not sustainable in the 50+ year range.
What I've been wanting to do is build a fully automated aquaponics system. Very low input requirements other than the costly LED lighting and energy. Theoretically could produce tons of food at tremendously low cost.
Give a man an industrial-grade hydroponic fish farm, he will eat in perpetuity until the machine fails and someone has to pay an engineer to go fix the fish machine on a Saturday morning.
With my luck I'm the engineer.
Hell, if he really wanted to save the world, he could buy twitter and then just turn it off. Problem solved!