A country has agreed to reduce the amount of greenhouse gases it emits by half within the next 20 years.
The plan includes reducing the country's methane emissions as well as its carbon dioxide emissions.
Explain why reducing methane emissions reduces the country's carbon footprint.
The country's plan is based on computer models of the climate.
Give one reason why the predictions made by these models are uncertain.
Suggest two reasons why the country may not achieve the reduction it has agreed.
40 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.