Commercial companies have considered large-scale ocean fertilization with all of the following to create phytoplankton blooms except ________.

A. iron
B. silica
C. urea
D. phosphorus

Answer: B

Environmental & Atmospheric Sciences

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Mountains are the __________ zone for river systems. See Figure 10.4.

Fill in the blank(s) with the appropriate word(s).

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Currently, desert and steppe lands cover about what percentage of Earth's land area?

A. 3% B. 10% C. 30% D. 66%

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Explain the Milankovitch Theory. What will be an ideal response?

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How can a building best be designed to become a passive solar collector for heat?

What will be an ideal response?

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