The Biosphere (Edexcel GCSE Geography A)

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Jacque Cartwright

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Biosphere Resources

  • The biosphere is important for providing resources for people

Resources of the Biosphere

Resource

Example

Food

Fish and meat

Fruit, berries, and nuts provide sustainable harvests of food

Natural vegetation can be replaced with crops of wheat, rice, etc.

Medicine

Vitamin C in citrus fruit prevents scurvy

Lichens stop blood loss from cuts

Willow bark provides aspirin to treat pain

Aloe vera plants soothe skin conditions

Building Materials

Timber

Straw for roofing and insulation

Animal dung mixed with clay and straw to make bricks

Clay, stone, cement, marble, etc. for building

Fuel

Fermenting crops like sugar cane to produce bioethanol

Trees and shrubs for burning

Animal dung is dried and burned

Peat is dried and burned

Exploitation of the Biosphere

  • The biosphere is exploited for commercial gain, including:

    • Mineral resources

    • Water

    • Energy

  • The scale of biosphere exploitation is increasing as technology and demand increase

Impacts of Exploitation on the Biosphere

Resource

Exploitation

Mineral Extraction

Large areas of land are cleared, destroying natural habitats that provide resources for local people

Chemicals used in the extraction process are waste products and end up polluting water systems and habitats

Water

The increased demand on water resources by agriculture, industry and urban areas means there is less water in the biosphere for other areas, such as wetlands

Plants and animals do not have enough water to survive in the biosphere

Energy

Population growth and development increase demand for energy resources

The production of biofuels reduces the amount of land available for local people to grow crops

Large areas of land are flooded for large-scale HEP schemes

Fossil fuel extraction comes with a high risk of biosphere pollution and has a negative impact on health of local people

Pipelines from oil exploitation damage the permafrost in tundra regions

Pollution and groundwater contamination result from fracking for shale gas

Exam Tip

You need to have an overall awareness of how much we depend on the biosphere for things we use on a daily basis and how, if we are not careful, these resources may be exploited to the point where it is not sustainable to continue using them.

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Jacque Cartwright

Author: Jacque Cartwright

Jacque graduated from the Open University with a BSc in Environmental Science and Geography before doing her PGCE with the University of St David’s, Swansea. Teaching is her passion and has taught across a wide range of specifications – GCSE/IGCSE and IB but particularly loves teaching the A-level Geography. For the last 5 years Jacque has been teaching online for international schools, and she knows what is needed to pass those pesky geography exams.