The terms polluted and contaminated have different meanings when it comes to substances put in the environment by human activity.  With respect to these substances, what does polluted mean?

A. concentration is high enough to cause harm to living organisms.
B. concentration is above natural levels, but harmful only to humans.
C. concentration is simply above the detection limit of modern instruments.
D. concentration is below natural levels and unlikely to harm humans.
E. concentration is above natural levels, but not harmful to living organisms.


Answer: A

Environmental & Atmospheric Sciences

You might also like to view...

If an environment is changed by disruption, a different climax community always establishes

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

In accordance with Boyle's Law, a gas under constant temperature will ________ in volume when the pressure is ________.

A. decrease; decreased B. keep the same volume regardless of pressure C. decrease; increased D. increase; increased

Environmental & Atmospheric Sciences

The analysis of a(n) ____ can be especially helpful when making a short-range forecast that covers a relatively small area, such as the mesoscale

a. sounding b. meteogram c. Doppler radar image d. thick chart e. index

Environmental & Atmospheric Sciences

Which of the following would not be considered a physical property?

A. conductivity B. hardness C. temperature at which a material catches on fire D. temperature at which a material melts E. color

Environmental & Atmospheric Sciences