The changing of a gas or vapor to
a liquid, as in the formation of
water droplets when steam cools

An agreement between MPCA and
responsible parties that has been
filed with the courts.

A site cleanup agreement between
MPCA and responsible parties

The protection or wise use of
natural resources, such as
forests, rivers and fuels, to
ensure their continuation.

To make impure or unsafe by
contact with potentially harmful
substances.

Machines that measure, on a
continuous basis, pollutants
released by a source. The 1990
Clean Air Act requires continuous
emission monitoring systems for
certain large sources.

A substance that is usually highly
acidic or alkaline that corrodes
materials with which in comes in
contact.

A group of very common air
pollutants regulated by the U.S.
Environmental Protection agency on
the basis of criteria (information
on health and/or environmental
effects of pollution). Criteria
air pollutants are widely
distributed all over the country

The process by which a substance
is broekn down into component
parts of basic elements. Food and
other plant and animal matter
decompose under the proper
conditions of light, air and
moisture.

Designed to be thrown away after
one use or after a limited period
of time.