GIS Skills check

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Presentation transcript:

6.7 Biological carbon cycles and the water cycle are threatened by human activity

GIS Skills check www.globalforestwatch.org a. Growing demand for food, fuel and resources globally affects terrestrial carbon stores, the water cycle and soil health. GIS Skills check www.globalforestwatch.org

Land use has changed: Deforestation Afforestation Grasslands to farmlands Between 1995 and 2005 arable land area increased by 24million hectares. Soils are estimated to store 3x more carbon than vegetation. Soil degradation due to poor land management prevents soils from storing carbon. In North America freshwater withdrawals from agriculture increased from 30% in 1998 to 38% in 2014.

b. Ocean acidification due to combustion of fossil fuels risks crossing the critical threshold for the health of coral reefs and other marine ecosystems. https://www.youtube.com/watch?v=kxPwbhFeZSw

c. Climate change due to EGE may increase frequency of droughts due to shifts in climate belts – this may impact on the health of forests.

Assess how biological carbon cycles and the water cycle are threatened by human activity. (20 marks) Use the work from today’s lesson to plan this response with your partner. Use PEEL to structure your response REMEMBER TO ASSESS THROUGHOUT You have 25 minutes to write the essay