The Green Hydrogen Dream is No Longer a Dream Dec 14, 2020 Hydrogen-fuel-cell cars have struggled to find mainstream buyers, but elsewhere in the transportation sector a mass movement towards green hydrogen fuel has begun to spark significant activity. Interest has picked up in the trucking, railway and aviation sectors, and the latest development could have widespread implications for the cargo shipping industry and for ferry travel, too. The road to green hydrogen According to the Clean Cargo Working Group, carbon emissions from the shipping industry have actually dropped as a percentage of global emissions in recent years. They now account for an estimated 2 to 3 percent of global emissions, down from a steady 3 percent in 2012.