Figure 1
From: External costs of atmospheric Pb emissions: valuation of neurotoxic impacts due to inhalation
Impact Pathway Approach. Impact Pathway Approach (IPA): theoretical steps to the left side boxes from top to bottom. The output parameters from models used in each of the steps specified in the right side boxes from top to bottom, where Pbair quantifies the concentration of Pb in the air, Δ-Pbair quantifies the marginal increase in Pbair and IQ quantifies the Intelligence Quotient.