Nine Percent of Global Energy Demand is Farm Based

According to the FAO, the agri-food chain accounts for 30 percent of the world's energy demand.

• 70% of this 30%, or 21% of total global energy demand, is from beyond the farm gate
• 30% of the 30%, or 9% of total global energy demand, is from the farm

Note that these numbers do not include land use, and land use is important for climate modeling.

Source: Energy, Agriculture, and Climate Change (FAO PDF)

For additional reading and graphs, see Energy for growing and harvesting crops is a large component of farm operating costs from the EIA.