Chapter 1. Gervais Animation Activities

6.23 Carbon Dioxide Patterns

Questions

Question

What has happened to atmospheric carbon dioxide levels over the past 800,000 years?

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Question

What must occur in order for carbon dioxide levels to reach 550 parts per million (ppm) by the year 2100?

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D.

Question

Why do carbon dioxide projections fall between 550 and 900 parts per million (ppm) by the year 2100?

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D.

Question

If the atmosphere contains 900 parts per million (ppm) of carbon dioxide by the year 2100, what can we conclude about the twenty-first century?

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