As of July 2013,what was the approximate concentration of CO₂ in the atmosphere? A) 190 ppm B) 225 ppm C) 280 ppm D) 330 ppm E) 399 ppm

Name: As of July 2013,what was the approximate concentration of CO 2 in the atmosphere? A) 190 ppm B) 225 ppm C) 280 ppm D) 330 ppm E) 399 ppm
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As of July 2013, the concentration of CO2 in the atmosphere was approximately 399 ppm, reflecting the ongoing increase in atmospheric CO2 levels due to human activities.

As of July 2013,what Was the Approximate Concentration of CO2

As of July 2013,what Was the Approximate Concentration of CO₂