Explanatory notes
… whereby the fatty acids in oils or fats react with an alcohol (usually methanol or ethanol) in the … can be obtained from vegetable oils (e.g., rapeseed, soya-bean, palm, sunflower, cotton-seed, jatropha), from animal … from used oils or fats (e.g., frying oils, recycled cooking grease). Biodiesel itself contains neither petroleum oils …