Methane from a landfill site is collected and burned as a fuel. This makes carbon dioxide.
Why does burning the methane reduce the contribution to global warming compared with letting it escape?
Methane is a more powerful greenhouse gas than carbon dioxide.
Carbon dioxide is not a greenhouse gas.
Burning methane removes carbon dioxide from the atmosphere.
Methane damages the ozone layer but carbon dioxide does not.
51 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.