TECH FOCUS: HYDROGEN AND ALTERNATIVE FUELS Drop-in fuel blends for a cleaner tomorrow How fast-pyrolysis bio-oil, hydrotreated vegetable oil, and diesel fuel blends may help transform heavy-duty transport. By SUNITA SISODIYA, SAE member and Ph.D. candidate at University College London. Heavy-duty transport is a sector that requires urgent decarbonization. Currently, it accounts for one-third of global transport's CO2 emissions. Given consensus support amongst climate scientists that anthropogenic climate change is underway, we need low-carbon solutions to be implemented today-not tomorrow. Low-carbon drop-in fuels such as hydrotreated vegetable oil (HVO) can and have already Fast-pyrolysis bio-oils (FPBOs) are promising renewable drop-in fuels derived from biomass. 18 November 2024 started to be integrated into existing vehicles and fueling infrastructure. UPDATE Contec