Compared to petroleum diesel, pure biodiesel (B100) produces a 73% reduction in lifecycle CO2 emissions, a 51% reduction in methane emissions, a 67% reduction in unburned hydrocarbons, a 48% reduction in carbon monoxide, a 47% reduction in particulate matter, a 100% reduction in sulphur oxide emissions, and an 80% reduction in polycyclic aromatic hydrocarbons, which can cause cancer and emphysema. Biodiesel is safe to handle and transport because it is as biodegradable as sugar, 10 times less toxic than table salt, and has a high flashpoint of about 125°C compared to petroleum diesel fuel, which has a flash point of 55°C.