The average concentration of methane (CH4\text{CH}_4CH4) in the Earth's atmosphere is commonly measured in parts per billion (ppb).
The table below shows the average concentration of methane in the atmosphere in July 2002 and in July 2022.
| Date | Average concentration of methane in ppb |
|---|---|
| July 2002 | 1774.83 |
| July 2022 | 1915.48 |
Calculate the increase in the average concentration of methane in the atmosphere, in ppb, from July 2002 to July 2022.
Give your answer to the nearest whole number.
Practise Edexcel GCSE Chemistry Earth and atmospheric science with exam-style questions for Foundation and Higher tier. 62 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
