Video: How Scientists Measure Carbon Dioxide in the Air

Scripps Institution of Oceanography at UC San Diego geophysicist Ralph Keeling gives a brief tour of the process by which scientists make measurements of how much CO2 is in the air.  Concentrations of the greenhouse gas were 315 parts per million when Keeling's father, Dave Keeling, began measuring it 60 years ago. Now levels are expected to surpass 410 ppm on a monthly basis starting this year.



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