9Since the early 1990s, advances in toxicology have allowed scientists to detect traces of adulterant substances in everyday products - even down to parts per billion concentrations. We can now detect the presence of harmful ingredients at levels so low that they actually cause no harm. This book explores the history of chemical fears and the recent events that amplified it. It describes how consumers, teachers, doctors, lawmakers and journalists can help make better connections with the public by telling stories that are more engaging about chemistry and materials science.