IGCSE Biology - 4d Human influences on the environment

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New Edexcel IGCSE 9-1 4BI1 syllabus for 2017 first examined in 2019


Section 4d Human influences on the environment


  • 4.12 understand the biological consequences of pollution of air by sulfur dioxide and carbon monoxide
  • 4.13 understand that water vapour, carbon dioxide, nitrous oxide, methane and CFCs are greenhouse gases
  • 4.14 understand how human activities contribute to greenhouse gases
  • 4.15 understand how an increase in greenhouse gases results in an enhanced greenhouse effect and that this may lead to global warming and its consequences
  • 4.16 understand the biological consequences of pollution of water by sewage
  • 4.17 understand the biological consequences of eutrophication caused by leached minerals from fertiliser
  • 4.18B understand the effects of deforestation, including leaching, soil erosion, disturbance of evapotranspiration and the carbon cycle, and the balance of atmospheric gases


New and updated resource for IGCSE 9-1- More practical pages, updated design, concept checker and exam style question for each topic.