Biodiesel (FAME): Resources and labour

Oil crops, waste fats and a dash of methanol

What this tab covers The natural resources (land, water, materials, fuel or feedstock) and the labour needed to capture this energy, per unit, with the reason each is needed.

Biodiesel needs oil-bearing crops or waste fats, methanol and a simple catalyst; land and the oil crop are by far the largest resource.

Natural resources

Resource	How much	Why it is needed
Oil feedstock (vegetable oils, used cooking oil, tallow)	About 100 lb of oil or fat per 100 lb of biodiesel (7.55 lb of soybean oil per gallon); vegetable oils projected at 69% and waste oils and tallow 23% of bio-based diesel feedstock in 2035¹¹²⁷	The fuel molecules are the fatty acid chains of the oil itself, so output cannot exceed feedstock input.
Methanol	About 10 lb per 100 lb of oil (0.8 lb per gallon in the Iowa plant model)¹¹²	Methanol supplies the methyl group that replaces glycerol on each fatty acid.
Catalyst (sodium or potassium hydroxide)	Small quantities; not quantified in the sources reviewed¹	An alkaline catalyst makes the reaction run fast at moderate temperature.
Land and water for oil crops	Biomass water footprint 24-143 m3/GJ depending on country; land per unit of biodiesel not quantified in the sources reviewed⁸	Oil is only a fraction of the harvested crop, so large areas of farmland are needed per unit of fuel.

Labour

Phase	How much	Skills	Why it is needed
Feedstock farming and collection	Most biofuel jobs are in feedstock supply; Indonesia had an estimated 798,600 liquid biofuel jobs in 2023⁹	Plantation and farm labour, fruit collection, oil milling	Oil palms and oilseeds must be harvested by hand or machine every season; palm fruit spoils if not milled quickly.
All phases (Brazil)	About 403,700 biodiesel jobs in 2023⁹	Soybean farming, crushing, plant operation	Biodiesel output is tied to large-scale oilseed farming and crushing.
Plant operation	Not quantified per plant in the sources reviewed¹	Chemical process operation, handling of methanol and caustic	Methanol is toxic and flammable, so trained operators and safety systems are needed.

Sources

Biodiesel Production and Distribution US Department of Energy, Alternative Fuels Data Center, 2025
Food crops to remain backbone of global biofuel production through 2035 (summary of OECD-FAO Agricultural Outlook 2026-2035; feedstock shares are 2035 projections) Down To Earth, 2026
The water footprint of bioenergy and other primary energy carriers (Gerbens-Leenes, Hoekstra and van der Meer, Value of Water Research Report 29) UNESCO-IHE / University of Twente, 2008
Renewable Energy and Jobs: Annual Review 2024 (2023 data) IRENA and International Labour Organization, 2024
Biodiesel Production Profits and Tax Credits (Irwin, farmdoc daily 16:46; representative Iowa soybean-oil FAME plant model) University of Illinois, farmdoc daily, 2026