An environmental survey recorded changes in human activities in two areas. The only change affecting greenhouse gas emissions in each area is shown in the table.
| Area | Human activity | At the start of the survey | At the end of the survey |
|---|---|---|---|
| W | Coal burned each year | 6500 tonnes | 9800 tonnes |
| Z | Waste sent to landfill each year | 2000 tonnes | 5600 tonnes |
For each area, name the greenhouse gas for which annual emissions are most likely to have increased. Give a reason for each answer.
Explain how the increased emissions identified in part (a) could cause the atmosphere to become warmer.
73 exam-style questions on AQA GCSE Chemistry 9.2 Carbon dioxide and methane as greenhouse gases, covering 9.2.1 Greenhouse gases, 9.2.2 Human activities which contribute to an increase in greenhouse gases in the, 9.2.3 Global climate change, and 9.2.4 The carbon footprint and its reduction. Each one has a worked solution and a mark scheme showing where the marks go.