The rules, put into motion through the ocean transport-regulating arm of the United Nations, take effect Jan. 1, 2020, and are aimed at slashing the amount of sulfur in marine fuel by more than 80%. The Trump administration raised the heat on the International Maritime Organization rules last week, saying it wants to ease the rollout because of the impact it may have on the economy and energy markets. A White House spokesman said the administration wants to phase in implementation to allow “experience building” that would lead to better understanding of the availability of cleaner fuels and their impact on ship operations. More in Logistics U.S. energy giant Exxon Mobil Corp. XOM -1.00% said the change is “one of the industry’s most defining moments since the shift from coal.” Industry executives have said the switch to cleaner fuels and emissions “scrubbing” technology will cost shipowners at least $15 […]