Hydroponics are one leg of the aquaponics duopoly. The other leg is using some animals to generate the nutrition the plants need, such as prawns, crawdads, or tilapia. I have no doubt this is a trend that will continue to grow, particularly as the drawbacks of legacy agriculture continue to conflate the hazards of chemical biocides, habitat loss, and other flaws.

"...some even using the method to grow cannabis..."

Am I the only guy that remembers people growing weed hydroponically back in the '80s?

Thanks!