Since "supply problems" certain do exist, as mentioned, it would be natural to think that a "point of use" system would be at least a contributor to the solution. Home gardening is available to nearly everyone who has a yard. Even some potted vegetation on the patio is helpful if that's all you have. But for those with a small amount of yard, it is a shame to not capitalize on the potential benefit. Nearly everyone has a bit of grass and a couple of trees, all of which produce "green-waste" and SHOULD be retained at the premises for compost and/or ground cover to eliminate weeds and conserve water, and feed the worms, etc. It's easy, fun, and lessens the landfills, and a whole bunch of negatives to boot!