Climate Change Quiz – 15 Questions

Question 5: Compared to 1750, how much more carbon dioxide is in our air today?
No change
No, 40% is the right answer. Not in the history of mankind has carbon dioxide levels reached such high levels. Research from ancient ice cores show that the last time carbon dioxide levels were this high, millions of years ago, our species had not yet even evolved.
20%
No, 40% is the right answer. Not in the history of mankind has carbon dioxide levels reached such high levels. Research from ancient ice cores show that the last time carbon dioxide levels were this high, millions of years ago, our species had not yet even evolved.
40%
Yes, you know your stuff! Not in the history of mankind has carbon dioxide levels reached such high levels. Research from ancient ice cores show that the last time carbon dioxide levels were this high, millions of years ago, our species had not yet even evolved.
100%
No, 40% is the right answer. Not in the history of mankind has carbon dioxide levels reached such high levels. Research from ancient ice cores show that the last time carbon dioxide levels were this high, millions of years ago, our species had not yet even evolved.
150%
No, 40% is the right answer. Not in the history of mankind has carbon dioxide levels reached such high levels. Research from ancient ice cores show that the last time carbon dioxide levels were this high, millions of years ago, our species had not yet even evolved.

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