Read the following paragraph and determine if the hypothesis is true:

Image copyright Google Image caption Crews were called to Whimpwell Green, near Happisburgh The fire service has been dealing with a "hazardous substance" near the Norfolk coast. Four crews plus the Environmental Protection Unit were called to Whimpwell Green, near Happisburgh, just before 03:00 GMT. Norfolk Fire and Rescue Service said it was a "low level" substance which posed "no harm to the public" and it had made the area safe. It is being removed by waste contractors.

Hypothesis: Hazardous substances can pose no harm to the public