The Increase in the Concentration of CO₂ in Earth's Atmosphere

question 103

Multiple Choice

The increase in the concentration of CO₂ in Earth's atmosphere over the past 100 years

• A) results from a decrease in the rate of CO₂ uptake by photosynthesis.
• B) is primarily caused by the burning of fossil fuels by humans.
• C) will likely decrease the average temperature on Earth.
• D) will result in lower sea levels.
• E) is very slow.

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