Which is the largest sinus cavity?
A.
Frontal sinus
B.
Maxillary sinus
C.
Sphenoidal sinus
D.
Ethnoid sinus

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: