When forests are cut down, most of this in the trees is released to the atmosphere, through decomposition or perhaps fire
A) carbon
B) sulfur
C) nitrogen
D) neon
E) oxygen
Answer: A
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A ________ is an advancing boundary where cold air overtakes and replaces warm air
Fill in the blank(s) with the appropriate word(s).
In plate tectonics, intense geologic activity occurs ________.
A. at continental interiors B. at plate boundaries C. along mountain ranges D. along coastlines E. at the ocean floor
The four main Native American culture groups of Poverty Point, Mississippian, Hopewell, and Adena are collectively known as _______ _____ civilizations. Historically, they were located in the eastern half of the United States
Fill in the blank(s) with correct word
Russia still needs to modernize its dilapidated__________ if it is to compete economically against the European Union, North America or East Asia.
a. manufacturing base b. transportation system c. housing stock d. economy e. agricultural system