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Carbon dioxide Quote by Heidi Cullen

“The instrument Keeling built, the gas chromatograph, works by passing infrared (IR) light through a sample of air and measuring the amount of IR absorbed by the air. Because carbon dioxide is a greenhouse gas, Keeling knew that the more IR absorbed by the air, the higher the concentration of CO2…” quote by Heidi Cullen
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““The instrument Keeling built, the gas chromatograph, works by passing infrared (IR) light through a sample of air and measuring the amount of IR absorbed by the air. Because carbon dioxide is a greenhouse gas, Keeling knew that the more IR absorbed by the air, the higher the concentration of CO2 in the air.””

Heidi Cullen

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