His intent is to build massive indoor farms Using AI to monitor food 24/7 for nutritional levels, Ph of the soil etal. He has spoken about it many times.
Bill Gates is the largest individual owner of farmland in the US. He did an interview once in which he said it is a hedge against a time when money has no meaning.
Not value. Meaning. Calories will always have meaning and value. Money gets printed with no backing and that challenges its erstwhile meaning.
Gates is diversifying away from money.