Figure 1From: How to consider engineered nanomaterials in major accident regulations?Example of an accident scenario. In 2011, a truck transporting several 750-kg bags of photocatalytic titanium dioxide (TiO2) has lost part of its cargo. Since TiO2 is not classified as a hazardous material, workers of the road maintenance department cleaned the road. (Photo from [18]; photographer: Arnaud Viry).Back to article page