Humans Are Pumping More and More Carbon Dioxide into the Atmosphere

question 87

Multiple Choice

Humans are pumping more and more carbon dioxide into the atmosphere, but the atmospheric concentrations of this gas are not increasing proportionately. Suggest an explanation.

• A)Instruments used to measure atmospheric carbon dioxide need to be relocated to more remote regions of the planet.
• B)Humans have been cutting back on their use of fossil fuels to a degree greater than predicted by experts.
• C)Most of the carbon dioxide we produce seeps into outer space.
• D)The ocean may be absorbing the excess quantities of carbon dioxide placed into the atmosphere.

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