The high human population has put a strain on food resources. Our mid west states have been at high production for decades only replacing N, P and K = commercial fertilizer; areas like China and India still use human labor or cattle to plow their fields. Both result in not enough quality food in the world. Ironically , the more poor a family is the foods decline in quality. I often ruminate about how to help people have a small garden, even if it is in pots.
And a chicken in every yard!!