Royal Dutch Shell PLC announced late last year it would slash capacity by half at its biggest oil refinery. For Singapore, where the plant has been a mainstay of the economy for six decades, it marked a turning point in one of the most successful bets on fossil fuels in history.

The plant on Bukom Island is part of a massive refining and petrochemical industry built largely on reclaimed islands just off the city-state. In tandem with the cargo vessels they fueled, the refineries helped drive Singapore’s economic success after independence, attracting billions in investment and spawning businesses from plastics to rig construction and finance.

"We’ve come a long way as a result of the energy and chemical sector,” said Tan See Leng, Singapore’s labor minister and second minister for trade and industry. "The key thing is not to completely sort of move away, but to see how we can pivot, how we can transform.”