Mucus lining the human upper respiratory tract

A. causes about 90% of pollution-related lung cancer.
B. is a significant source of radon.
C. generates carbon monoxide.
D. removes particles and dissolves some gaseous pollutants.
E. is a major source of CFCs.


Answer: D

Environmental & Atmospheric Sciences

You might also like to view...

CHP conserves energy in industrial buildings by

A) charging batteries when power demand drops. B) drawing on the heat of the earth to make electricity. C) installing solar panels on the top of power plants. D) using the waste heat generated to warm buildings.

Environmental & Atmospheric Sciences

Advection fogs form best when there is no wind

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Why is fossil evidence usually not enough to give a complete record of evolution?

a. soft bodied organisms do not readily fossilize b. teeth and shells do not fossilize c. some fossils are buried too deep for scientists to reach d. organisms that are eaten after death are unlikely to fossilize e. movement of earths crust destroys some fossils

Environmental & Atmospheric Sciences

When does peer review occur during the scientific process?

A) after the paper (manuscript) is published B) after the research is complete and before the paper (manuscript) is written C) after the paper (manuscript) is written and before it is published D) during the research phase of a project E) during the statistical analysis of the data collected

Environmental & Atmospheric Sciences