UK - Chemicals - Environmental Hazard

A Dangerous for the environment hazard storage sign on the side of a petrochemical lorry. The European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) fixed pictograms for transportation. Vehicles carrying dangerous goods have to be fitted with orange signs, where the lower number identifies the substance, while the upper number is a key for the threat it may pose. (Photo by In Pictures Ltd./Corbis via Getty Images)