Enamel cookware is ubiquitous. The trouble is that enamels —like other vitreous substances, or frits, used in making porcelain or ceramic glazes— are produced through a process generating highly toxic chemicals .

In 2009, Czech and Slovak scientists involved in EU funded Envirisk project, completed their analysis of the impact of air impurity on population health, based on 15 years of past data available from their respective countries.