Degrading of land, atmosphere &water by Evangeline Nonis https://padlet.com/noniseva/s6j27ps6r0e4u9u en-us 2023-02-07 01:18:13 UTC 2023-06-01 09:40:16 UTC hello@padlet.com 2.2 degradation of land noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2470992244
  • The loss of productivity and decline in fertility of land based environments as a result of human activities
  • affects one quarter of the world's total land 
  • 38 % of the world farmed areas
    • ]]>     2023-02-07 01:21:21 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2470992244     Soil erosion noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477245436
  • soil is gradually worn away by natural phenomena (rivers, rain, glaciers, wind)
  • causes: human activities (clearing trees)
  • impacts: vulnerable to wind erosion, gully erosion & sheet erosion
  • eg. the Murray-Darling Basin

    • ]]>     2023-02-11 11:09:24 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477245436     Soil degradation noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477245574
  • loss of fertility of the soil due to chemical change
  • causes: compacted by large machinery, hard hooved animals (cattle & sheep), acidic 
  • impacts: Australia - build up of salt in the topsoil (salinity)
  • eg. water erosion

    • ]]>     2023-02-11 11:09:46 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477245574     Ecosystem decline noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477722233
  • natural ecosystems (forests & streams) can become degraded
  • causes: loss of vegetation, invasion of alien plant, animal pests or decline in quality of streams & rivers
  • impacts: soil, stream & river quality, desertification
  • eg. cattle grazing leads to breakdown in soil structure & loss of plants
    • ]]>     2023-02-12 09:45:52 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477722233     2.3 degrading the atmostphere noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477733570
  • pollutants (carbon, nitrogen, sulfur) are realsed into the atmostphere from transport and factories
  • ozone layer
    • ]]>     2023-02-12 10:14:45 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477733570     Air pollution noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477735272
  • world's worst environmental health risk today
  • causes: traffic exaust, factory & power plant emmisons & fires
  • impacts: asthma, lung & heart disease
  • deaths: 3.5 million outdoor pollution, 4.3 million indoor air pollution
  • eg. air pollution deaths in asia and africa are increasing
  • half of the world's 40 most polluted cities were in India
    • ]]>     2023-02-12 10:18:56 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477735272     2.4 degrading water noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477738474
  • inland waters (rivers, lakes & wetlands) are some of the world's most degraded environments
  • human activities have reduced the quality & quantity of clean fresh water
  • water used for homes, factories, farms, damming rivers for water supply, flood control & hydroelectricity 
  • aquifers
    • ]]>     2023-02-12 10:26:21 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477738474     Damming the rivers noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477742123
  • world's 292 large river systems, 2/3 have been changed by dams & reservoirs 
  • causes: dams
  • impacts: distrup the flow of water, flooding some areas, blocking the water from other areas, ecosystem services
  • eg. Northern California has excess nutrients
    • ]]>     2023-02-12 10:35:04 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477742123     Pollutants in our water noniseva https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477744809
  • is the contamination of our rivers, lakes, wetlands, estuaries, seas, oceans
  • cause: human activities (shipping, fishing, oil drilling). Fetiulisers & pesticides, littering
  • impacts: people lose access to safe, clean drinking water, fish and other animals are killed, food shortages, famine
  • eg. rivers
    • ]]>     2023-02-12 10:41:25 UTC https://padlet.com/noniseva/s6j27ps6r0e4u9u/wish/2477744809