What term refers to harmful chemicals emitted directly into the air from natural processes and human activities at concentrations high enough to cause harm?
A. secondary pollutants
B. direct smog
C. photochemical smog
D. tertiary pollutants
E. primary pollutants
Answer: E
You might also like to view...
How long has the climate that people are experiencing today been around?
A) about 5000 years B) about 100 years C) about 1 million years D) about 10,000 year
Which is considered a physical factor?
a. Diffusion b. Dissolved nutrients c. Surface-to-volume ratio d. Active transport
Island A is one square mile in area and has 100 species. Following the theory of island biogeography, how many species do you expect to find on the neighboring Island B that is ten square miles in area?
a. 200 b. 100 c. 50 d. 1000
Organic compounds are those substances
A. found only in living organisms. B. composed of atoms of a single element. C. containing chains and rings of carbon atoms. D. exhibiting radioactive decay.