The salmon you buy in the future may be farmed on land
A giant fish farm in Florida is rearing salmon for the US market in a huge indoor facility. …
Called “recirculating aquaculture systems”, or RAS for short, they control everything from the temperature, salinity and pH of the water, to its oxygen levels, artificial currents, lighting cycles, and removal of carbon dioxide and waste. The latter are filtered out, and treated water is reused.