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What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?
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Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
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The biosphere of the earth is made up of what compound? organic or inorganic?
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