Protecting human health and the environment from the dangers of hazardous chemicals and wastes is a growing area of responsibility for enforcement officers and Customs in particular. The Secretariat of the Basel, Rotterdam and Stockholm Conventions encourages REN’s efforts towards supporting Customs to fully embrace this responsibility. This booklet, with its focus on information specific to the region, is a welcome initiative to raise awareness at the regional level on key information for effectively preventing and combating illegal traffic and trade in hazardous chemicals and wastes.