Using the graph shown, by about what per cent did carbon dioxide rise between 1960 and 2020?

Question 20

MediumOriginal question

Using the graph shown, by about what per cent did carbon dioxide rise between 1960 and 2020?

Options for question 20

AOption A23%Correct answerYour answerBOption B31%Correct answerYour answerCOption C97%Correct answerYour answerDOption D131%Correct answerYour answer

Check

Show the answer and explanation

✓CorrectNot quiteAnswer B

Correct answer: B

Explanation

1. 01

   Rise = 414 − 317 = 97 ppm.

2. 02

   97 ÷ 317 × 100 ≈ 31%.

Worth noting

23% divides by the 2020 level; growth is measured on the starting level.

Concept

Reading a CO₂ graph

Typical timeTypical

70 s

Your timeYours

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The rule this testsGlobal warming and ozone depletion→

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