the mixture of invisible odorless, tasteless nitrogen and oxygen gases that surrounds the earth.

easily broken down in the environment.

a profession for which one trains and which is undertaken as a permanent calling.

people with common interest living in a particular area.

the saving of resources.

an agency of the U.S. government that is dedicated to protecting the environment.

the oil, coal, and natural gas that are used to provide energy.

water that collects under the earth's surface.

human-made liquid, solid, sludge, or radioactive wastes that may endanger human health or the environment.

huge, specially designed pits where waste materials are dumped and buried.

an event caused by nature those results in widespread damage.

loud, confused, or senseless shouting or outcry.

substances that cannot be replaced once they are used.

a branch of the U.S. Department of Labor that protects American workers.

dirty or harmful substances in the environment.

energy radiated in the form of waves or particles.

human waste, garbage, detergents, and other household waste washed down drains and toilets.

the liquid that descends from the clouds as rain, forms streams, lakes, and seas.

any event that was not intended to happen.

a series of events that include a situation, an unsafe habit, and an unsafe action.

injuries that result from an accident.

the immediate, temporary care given to an injured or ill person until he or she can get professional help.

a life threatening condition characterized by faintness, nausea, rapid heartbeat, and hot, red, dry, or sweaty skin.

a life threatening condition in which the circulatory system fails to deliver enough blood to vital tissues and organs.

actions taken to prevent the spread of disease by treating all blood as if it were contaminated.