Our key sustainability factors identify the most material environmental and social risks assessed in our ESG Evaluation. We assess the materiality of those risks across the industry’s value chain and reflect them in the weighting of our environmental and social factors. We also provide the quantitative indicators used to assess a company’s performance relative to its industry peers on each of those factors. The transportation industry is divided into transportation media (air, road, rail, sea/river), with further segmentation between passenger and freight transport.