331646.027 ÷ 3.7853 = 87614.198

BC ÷ K = B

Each gallon of petrol is 3.7853 liters, converted from liter to gallons using the formula.

87614.918 × 125,000 = 10,951,774,750

B × B_S = A_b

Lead-free gas releases 125,000 BTU (produced thermal energy). T hus, using this formula, the BTU gasoline is obtained per gallon.

10.95177475 × 19.35 = 211.916

A_b × R = F_c

Each gallon of petrol releases 19.35 tons of carbon, so this formula produces the amount of released carbon from the amount of consumed petrol.

211.916 × 1_ha ÷ 1.8 = 117.73

F_c × H ÷ R_c = L

Each hectare of fertile soil absorbs 1.8 carbons; in this formula the required land is obtained to absorb carbon.

117.73 ÷ 46,900 = 0.002

L ÷ P = EF_b

In final stage, footprint per person is obtained by dividing required land for carbon absorption on city population.