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May 20, 2021 09:57 PM EDT (Photo : Kim Kenny) Biofuels turned out to be very good choices because they have zero or very, very low sulfur relative to fossil fuels, said Eric Tan, NREL s senior research engineer and lead author of a recent paper published in the journal Environmental Science and Technology. Ling Tao, also from NREL, and scientists from Argonne National Laboratory, Pacific Northwest National Laboratory, and the US Department of Transportation s Maritime Administration are co-authors of Biofuel Options for Marine Applications: Techno-Economic and Life-Cycle Analyses. Reduced Volumes of Sulfur Oxide (Photo : Wikimedia Commons) After 2005, the International Marine Organization (IMO) has gradually reduced the volume of sulfur oxides that ships are permitted to emit. The sulfur content of ships fuel oil was lowered to 0.5 percent from 3.5 percent under the most recent upper cap, which went into operation at the start of 2020. According to the IMO, the reduction w

United statesWikimedia commonsSikuliaq kim kennyAlliance for sustainable energyInternational marine organizationPacific northwest national laboratoryOld sea oil rigsOil rigNational renewable energy laboratoryArgonne national laboratoryDepartment of energyEnergy departmentUs department of transportationBioenergy technologies officeUs department of energyMaritime administration