Here is the worlds first lab grown meatball from a few months ago. They're aiming to have this on the market in five years.
There is an indoor lettuce factory in Japan that is half the size of a football field that produces 10,000 heads of lettuce per day. It uses 1% as much water per head as regular lettuce farming and it's unaffected by weather (assuming it has a supply of electricity). There's no need to use pesticides because there are no pests in the sterile indoor environment they use. The lettuce doesn't need cleaned because it has never been dirty.
Technology is starting to be able to do some amazing things with food. And the reaction to it is interesting because some people are like "Yeah, apply technology to food, that's good" while others are like "No, this is not natural, it's bad."
So here is my question (math guys). A football filed is 160 ft wide x 150 ft long (only half the field as stated above). That is 24,000 sq ft, If a head of lettuce is 1 ft across (just a guess) then that means 24,000 heads can be grown. 10,000 heads per day as stated above means that 1/2 of the area would have to be turned over every 1.5 days. How can you grow a head of lettuce in 1.5 days????