How many metric tons of air pollutants does the United States release every day?

a. 100,000
b. 200,000
c. 500,000
d. 700,000
e. 900,000


ANSWER: d

Biology & Microbiology

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Biology & Microbiology

The two polynucleotide chains in a DNA molecule are attached to each other by

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Biology & Microbiology