Based on the Data Taken at the Observatory on Mauna

question 7

Multiple Choice

Based on the data taken at the observatory on Mauna Loa, from 1995 to 2005 the concentration of carbon dioxide in the atmosphere has increased by approximately

• A) 360 ppm
• B) 380 ppm.
• C) 20 ppm
• D) 80 ppm
• E) 100 ppm

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