Toxic Turmoil

When an accident involves many people and when its consequences are many and serious, we speak of a disaster. Disasters have the same causal fac­ tors as accidents: they differ from accidents by the gravity of consequences, not by causes. The action of a single individual may result in thousands of deaths and huge financial losses. The metal fatigue of a screw may, by a chain of events, cause an explosion killing hundreds or lead to a break in a dam and a devastating flood. The fact that minor a