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Resource and environmental issues PowerPoint PPT Presentation

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Resource and environmental issues. Example of Environmental issues. Deforestation Environmental Impacts of Mining Global Warming “Tragedy of the commons”—overfishing and other. Deforestation. Jungle burned for agriculture in southern Mexico. Logging in Malaysia.

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Resource and environmental issues

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Resource and environmental issues l.jpg

Resource and environmental issues

Example of environmental issues l.jpg

Example of Environmental issues

  • Deforestation

  • Environmental Impacts of Mining

  • Global Warming

  • “Tragedy of the commons”—overfishing and other

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Jungle burned for agriculture in southern Mexico

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Logging in


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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

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Chuquicamata, the largest open pit copper mine in the world, Chile

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Iron hydroxide precipitate stains a stream receiving acid drainage from surface coal mining.

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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

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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

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Global Warming

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Environmental Effects ofGlobal 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)

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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.

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“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.

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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

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This is another example

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  • If anyone can throw charms onto the wishing tree (a shared resource) without caring the consequence, the tree will eventually collapse.

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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.

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

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