Which of the following statement about carbon dixoide is not true?
a.) increased carbon dioxide in the atmosphere increases the green house effect
b.) carbon dioxide is a greenhouse gas
c.) atmospheric carbon dioxide levels have slowly declined over the last 50 years
d.) burning fossil fuels can increase carbon dioxide levels in the atmosphere
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An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil
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Which of the following statement about carbon dixoide is not true?
a.) increased carbon dioxide in...
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