A conservation group restored a damaged peat bog by blocking drainage channels. Scientists measured the mean carbon dioxide released from peat before and after the restoration.
| Condition of peat | Mean carbon dioxide released in mg per kg of peat per day |
|---|---|
| Drained | 16.8 |
| Waterlogged | 5.7 |
Calculate the percentage reduction in the mean carbon dioxide released when the peat was waterlogged.
Give your answer to 3 significant figures.
Explain why blocking the drainage channels could help to slow global warming.
84 exam-style questions on AQA GCSE Biology 7.3 Biodiversity and the effect of human interaction on ecosystems, covering 7.3.1 Biodiversity, 7.3.2 Waste management, 7.3.3 Land use, 7.3.4 Deforestation, 7.3.5 Global warming, and 7.3.6 Maintaining biodiversity. Each one has a worked solution and a mark scheme showing where the marks go.