Unfortunately nobody has solved the pesky problem that people need to eat at least once a day, so somebody has to work in the food industry. Getting rid of these central markets means smaller markets spread all over the country will do the same work, but likely making the food more expensive and the supply less reliable.
Exactly, random rivers throughout Alaska could be turning orange than eventually going back to blue for the last 10,000+ years for all we know. As the article stressed, these rivers are in the middle of nowhere so it would be hard for anybody to notice. But that story is boring, better to turn it into a menacing tale of climate change for more clicks.