At least that's their ostensible purpose.
We started growing some of our own food, but it is a lot of work, takes more land than expected and water.
All worth it.
Well, I farmed for a year and grew a crop of corn
That stretched as far as the eye can see
That’s a whole lot of cornflakes,
Near enough to feed New York till 1973
Cultivation is my station and the nation
Buys my corn from me immediately
And holding sixty thousand bucks, I watch as dumper trucks
Tip New York’s corn flakes in the sea
-The Who (Now I’m A Farmer)