Singapore engineer pivots from oil rigs to 'fish farm of the future'
A high-tech fish farm floats just off the coast of Singapore, part of a plan by a retired engineer who once built oil rigs to bring diners cleaner, healthier seafood. The tiny city-state imports 90 percent of its food but hopes to locally source about a third of it by 2030 to guard against supply disruptions such as climate change, disease and conflict. So officials are backing projects