Over in Singapore’s Tuas industrial district, workers are assembling a giant floating production, storage, and offloading (FPSO) unit, part of the infrastructure that separates crude oil from what’s pulled up from offshore reservoirs. Next to it is a giant Goliath crane, which can lift up to 30,000 tons in a single heave; a gleaming white Royal Caribbean cruise ship sits just a few docks away. This particular FPSO vessel, built by Singapore’s Se…