CFCs primarily contribute to the destruction of the ozone by
A) producing chlorinated gases that reflect a significant amount of ultraviolet light.
B) releasing carbon monoxide into the stratosphere, which reacts with the oxygen in ozone.
C) releasing gases into the stratosphere that block the enzymes that create ozone.
D) contributing free chlorine atoms, which act as a catalyst in the breakdown of ozone.
D
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The isotope composition of ________ in foraminifera shells from sediment cores are used to determine climate change in Earth history.
A. oxygen B. carbon C. lead D. helium E. uranium
At ________, Cameroon, a dense cloud of gas was released from a volcanic crater, flowing down the volcano and killing hundreds of people
Fill in the blank(s) with correct word
In which of the following climate types does steppe vegetation most likely occur?
A. semi-arid climate B. humid subtropical climate C. marine climate D. subpolar climate
Alluvial fan sediment is deposited by flashflood, sheetflow, mudflow, and debris flow
Indicate whether the statement is true or false