The world’s largest shipping company, A.P. Moller Maersk A/S, aims to have net-zero carbon dioxide emissions from its own ocean operations by 2050 as the industry responsible for around 3 percent of global CO2 emissions looks to boost sustainable seaborne transportation. Yet, the ambition of Maersk, and that of other shipping firms, clashes with the scarcity of feedstock for biofuels, amid limited availability of the key ingredient for producing biofuels—used cooking oil. The problem with running ships on green fuels is not the vessel technology; it’s the fuel product scarcity, Maersk’s chief executive Søren Skou told Bloomberg earlier this month. “We can’t keep scaling it. If our growth rates continue, we will run out of cooking oil in one or two years,” Skou noted. Maersk has committed to decarbonize its operations and slash its CO2 emissions by 60 percent by 2030 compared to 2008 levels and have net-zero CO? […]