A study by The International Council on Clean Transportation (ICCT) indicates that diesel fuel still has the highest carbon monoxide (CO) emissions compared to biodiesel. This calculation is based on regression analysis of air quality studies in Indonesia.
Diesel fuel recorded emissions of 0.88 grams/km. Biodiesel blends, however, show varying emissions depending on the blend ratio. B20 produced 0.83 g/km of CO. Higher blend ratios resulted in lower CO emissions; B30 and B50 produced 0.82 g/km and 0.77 g/km respectively.
However, for biodiesel, vehicle emissions are not the only factor contributing to environmental pollution. Other factors include the emissions footprint throughout the biodiesel supply chain, resulting in significantly larger and more complex overall emissions.
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