Populations of commercially-important species are only about 50% of he size they were 100 years ago. And, i shit you not: that is a rather conservative estimate.
Don't take my work for it. The most cited number is 10%.
And farmed fish are wreaking havoc in the local marine environment wherever they are. Most countries have laws protecting water from "overnutrition" (which kills most marine life) yet the farmed fishing industry seems largely exempt from those laws. Outside my home town of 100.000 inhabitants they just opened a new salmon farm that lets out as much nitrogen into the water as would the whole town's sewer system if we just dumped it all at sea.
Fish might be sustainable from a co2(e) point of view, but most fisheries and fish farms are not.
Yeah, I get that. That's why I added the proviso about ecosystem damage. I'm talking about designed ecosystems that process human waste into soil, plants, fish, and finally potable water.
Don't take my work for it. The most cited number is 10%.
And farmed fish are wreaking havoc in the local marine environment wherever they are. Most countries have laws protecting water from "overnutrition" (which kills most marine life) yet the farmed fishing industry seems largely exempt from those laws. Outside my home town of 100.000 inhabitants they just opened a new salmon farm that lets out as much nitrogen into the water as would the whole town's sewer system if we just dumped it all at sea.
Fish might be sustainable from a co2(e) point of view, but most fisheries and fish farms are not.