The biomass that can be constructed from resources can be calculated by comparing the concentration of elements in the resource materials and in biomass (Equation 1).[1][2][3] A given mass of resource materials (mresource) can support mbiomass, X of biomass containing element X (considering X as the limiting nutrient), where cresource, X is the concentration (mass per unit mass) of element X in the resource material and cbiomass, X is its concentration in the biomass.