Types of threats
w Threats can be
n Biological
n Chemical
n Radioactive
n Physical
w In the
n Natural environment
n Built environment
l Home
l Workplace
l Community
w They can be spread by
n Air: indoor and out
n Water: drinking or not
n Soil: direct or indirect
n Or a combination
w And caused by
n Natural events
l Seasonal
l Exceptional
n Human activity
l Incidental
l Deliberate
N5290, Sept. 27, 2004