Many scientists agree that human activities are causing the temperature of the Earth's atmosphere to increase at the surface. Their conclusion is based on peer-reviewed evidence. What does peer-reviewed mean?
The evidence has been collected by more than one team of scientists
The evidence has been checked by other scientists working in that field
The evidence has been reported in newspapers and on the television
The evidence has been repeated enough times to give the same result
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.