Contact with hazardous substances at work is endangering the health of workers across Europe and nanotechnology is one of the risks causing most concern, an expert report has concluded. ‘Expert forecast on emerging chemical risks’, published by the Bilbao-based European Agency for Safety and Health at Work (EU-OSHA), identifies the main groups of substances which could pose new and increasing risks to workers, contributing to diseases which range from allergies, asthma and infertility to cancers.