Particulate matter
A) are not a health concern due to the small size and relatively small effect on human health.
B) is a mixture of fine particles that impact human health.
C) has not yet been studied by scientists.
D) is, by definition, larger than 100 microns.
E) has not been associated with health risks.
B
You might also like to view...
The winds aloft in the middle latitudes would not blow from the west if ____
A) Earth's rotation slowed or increased slightly B) Earth's tilt changed slightly C) air over high latitudes became warmer than over the equator D) direction of the moon's orbit around Earth was reversed
Increased numbers of aerosols in the atmosphere
A) means fewer cloud condensation nuclei. B) can only come from human activities. C) makes clouds more reflective. D) makes clouds more likely to produce precipitation. E) none of the above
Sea breezes are more likely at night, while land breezes are more likely during the day
Indicate whether the statement is true or false
Hot, muggy summers are a trademark of the ____ climate
a. ?humid continental with hot summers (Dfa) b. ?semi-arid (BS) c. ?humid subtropical (Cfa) d. ?marine (Cfb) e. ?dry-summer subtropical (Cs)