Suggest reasons why levels of carbon dioxide in the atmosphere have changed over time.
CO2 levels in the atmosphere could have increased due to deforestation, as there are now less trees to re-absorb this gas. Emissions of CO2 may also have risen due to the increased burning of fossil fuels, such as coal and gas.
SJ
Related Geography GCSE answers
All answers ▸Outline how overpopulation is a major cause of poverty
Discuss the nature and impacts of one or more earthquake events that you have studied (10marks)
Describe the issues commonly found in shanty towns in rapidly developing urban areas.
Explain how volcanic eruptions occur at destructive plate margins (4 marks usually).