Over the last 400,000 years, how have atmospheric CO 2 levels changed?

Based on the data from ice cores, atmospheric CO2 levels have fluctuated over the last 400,000 years, with periods of higher and lower concentrations. However, it's important to note that the current rate of increase is much faster than any natural fluctuations seen in the past.

Over the last 400,000 years, how have atmospheric CO 2 levels changed?

Based on the data from ice cores, atmospheric CO2 levels have fluctuated over the last 400,000 years, with periods of higher and lower concentrations. However, it's important to note that the current rate of increase is much faster than any natural fluctuations seen in the past.

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Over the Last 400,000 Years, How Have Atmospheric CO₂ Levels

Question 58

Multiple Choice

Over the last 400,000 years, how have atmospheric CO₂ levels changed?

A) Atmospheric CO₂ levels have remained the same.
B) Atmospheric CO₂ levels have been steadily increasing overall.
C) Atmospheric CO₂ levels have been steadily decreasing overall.
D) Atmospheric CO₂ levels have fluctuated periodically.

Correct Answer: