There are _________ regions that together define the United States and Canada.

-five
-two
-nine
-six
-eleven


-nine

Environmental & Atmospheric Sciences

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The cap-and-trade approach to pollution reduction means a permit holder not using its entire allocation can save credits for future expansion

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Subsidence is most likely to occur with underground mining.

a. true b. false

Environmental & Atmospheric Sciences

The universe is presently 98% hydrogen and helium. Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The accuracy of hurricane forecasting

A) has improved over the past decade. B) has declined over the past decade. C) will never be good enough to save lives. D) depends greatly on the size of the storm. E) depends greatly on the strongest wind speeds in the storm.

Environmental & Atmospheric Sciences