Not sure. But not everyone uses fertilizer. No till is being more widely appreciated, getting nitrogen in the soil using cover crops that fix it from the atmosphere. Probably everything uses oil for lube including any alternative energy. Teslas still need greasing after all. They still have bearings and other moving parts.
replySome crops can require as much as 10 calories of petrochemical energy to get 1 calorie of food energy when one takes such things into account --- corn (well, maize) is quite calorie dense/efficient in terms of land and other usages --- I'd be curious to see a full, comprehensive crunching of the values involved.
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