A generationago, Puerto Montt, the last town before southern Chile breaks up into a myriad of islands and fjords, was such a dead place that wags changed its prefix to "Muerto" Montt. Nowadays it is booming, thanks to salmon farming, an industry that last year produced $2.2 billion in export revenues. That makes Chile the world's second-largest exporter of salmon after Norway. But some people worry that the industry has grown too fast for its own good.rnOutput is now stagnating, mainly because of the prevalence of diseases among the fish. These include infectious salmon anaemia, a virus that first appeared in Norway in the 1980s but from which Chile had remained free until last year. As if that was not enough, a report in the New York Times in March suggested that antibiotic and hormone residues could make Chilean salmon unsafe to eat.
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