un rapport de l'OCDE serious health-related costs The Cost of Air Pollution: Health impacts of road transport OECD report OECD este informe este informe costs OECD countries Health Impacts of Road Transport economic costs costs OECD countries amounts to $3.5 trillion a year costs OECD economic costs The Cost of Air Pollution Health Impacts of Road Transport. OECD OECD estimates countries felmérése USD 1.4 trillion OECD The Cost of Air Pollution Health Impacts of Road Transport. serious health-related costs reduce health care costs