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Resource and environmental issues

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Resource and environmental issues Example of Environmental issues Deforestation Environmental Impacts of Mining Global Warming Tragedy of the commons ... – PowerPoint PPT presentation

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Title: Resource and environmental issues


1
Resource and environmental issues
2
Example of Environmental issues
  • Deforestation
  • Environmental Impacts of Mining
  • Global Warming
  • Tragedy of the commonsoverfishing and other

3
Deforestation
4
Jungle burned for agriculture in southern Mexico
5
Logging in Malaysia.
6
Environmental impacts caused by deforestation
  • Burning forests and decay of wood after logging
    contribute to the release of greenhouse gases
  • Loss of biodiversity
  • Forests are important parts of hydrologic cycle
    in nature

7
Mining
8
Chuquicamata, the largest open pit copper mine in
the world, Chile
9
Iron hydroxide precipitate stains a stream
receiving acid drainage from surface coal mining.
10
Environmental impacts of mining
  • Land/soil erosion
  • Formation of sinkholes,
  • Loss of biodiversity in the area
  • Contamination of groundwaters by chemicals from
    the mining process and products.
  • Abandoned mines can still pose safety hazards
    such as deadly gases

11
Chemicals used for mining
  • Sodium cyanide for extraction of gold
  • Sulphuric acid for extraction of copper from
    copper oxides
  • If these chemicals are not handled properly,
    serious environmental impacts may occur to the
    neighbouring environment

12
Global Warming
13
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14
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15
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16
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17
Environmental Effects of Global Warming
  • Melting of permafrost and polar ice
  • Rising sea level
  • Spread of pests and disease
  • Ecological impacts (e.g. disturbed life cycle of
    flora-fauna)

18
This image is of the Easton Glacier on Mount
Baker in the North Cascades of Washington taken
in 2003. It shows the terminus position of the
glacier in 1985 as well.
19
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20
Tragedy of the Commons
  • Free access and unrestricted demand for a finite
    resource ultimately dooms the resource through
    over-exploitation.
  • Release of carbon dioxide into the atmosphere is
    one example. As everyone can release carbon
    dioxide into the atmosphere with little personal
    consequence, people tends to care very little
    about limiting its emission.
  • Overfishing in the open sea is another example.
    If everyone with a fishing boat can fish as much
    as they like, they will eventually drive the fish
    stock to commercially extinct.

21
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22
State of Global Fisheries
  • The FAO State of World Fisheries and Aquaculture
    2004 report estimates that in 2003, of the main
    fish stocks or groups of resources for which
    assessment information is available,
    "approximately one-quarter were overexploited,
    depleted or recovering from depletion and needed
    rebuilding.
  • edible fish are endangered in 14 of the world's
    16 major fishing areas

23
This is another example
24
  • If anyone can throw charms onto the wishing tree
    (a shared resource) without caring the
    consequence, the tree will eventually collapse.

25
Any solution?
  • Some suggested that overexploitation of a
    resource can be solved by proper management of
    the property right to use the resource.
  • Licensing and tradeable quota are some possible
    financial instruments.

26
Question
  • If there is another wishing tree, how should it
    be managed?
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