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  •  Environmental Studies Factsheet: 140 Ecological impacts of reintroducing wolves

    Environmental Studies Factsheet: 140 Ecological impacts of reintroducing wolves

    Almost immediately the population of elk started to increase. Although the elk were still preyed upon by black and grizzly bears and cougars, the removal of the wolves was a huge reduction in preda...

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  •  Environmental Studies Factsheet: 141 DDT Ban

    Environmental Studies Factsheet: 141 DDT Ban

    DDT is a persistent organic pesticide previously widely used in agriculture. Although it is now banned in most developed countries it is still used in many LEDCs to prevent insect-borne disease....

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  •  Environmental Studies Factsheet: 142. The Living Planet Index

    Environmental Studies Factsheet: 142. The Living Planet Index

    WWF (the Worldwide Fund for Nature) has published Living Planet Reports annually since 1998. The report describes the changing state of global biodiversity. One of the two indicators in the report is ...

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  •  Environmental Studies Factsheet: 143. - Shale gas and earthquakes!

    Environmental Studies Factsheet: 143. - Shale gas and earthquakes!

    This Factsheet:• Describes the nature of shale gas• Explains the process and environmental impacts of fracking• Uses shale gas drilling near Blackpool as a Case Study...

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  •  Environmental Studies Factsheet: 144. Mercury in the Arctic

    Environmental Studies Factsheet: 144. Mercury in the Arctic

    Mercury is released naturally into the environment from volcanoes and from rock weathering. Humans release mercury during mining operations but the biggest human source is coal burning. Human sources ...

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  •  Environmental Studies Factsheet: 145. Desalination or a new reservoir for Melbourne?

    Environmental Studies Factsheet: 145. Desalination or a new reservoir for Melbourne?

    This Factsheet describes the arguments for and against increasing Melbourne’s water supply by desalination or via a new reservoir. Desalination involves extracting salt from seawater to increase...

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  •  Environmental Studies Factsheet: 147. Aquatic predator-prey relationships

    Environmental Studies Factsheet: 147. Aquatic predator-prey relationships

    Aquatic habitats such as ponds and streams are convenient to study and commonly feature in exam questions. This Factsheet:• Describes the ecological principles behind aquatic predatorpreyrelation...

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  •  Environmental Studies Factsheet: 148. Can we use beetles instead of herbicides?

    Environmental Studies Factsheet: 148. Can we use beetles instead of herbicides?

    Weeds compete with crops for light, water and soil nutrients. Farmers use herbicides – chemicals that kill weeds e.g. 2,4-D – to reduce this competition and increase the yield of their cro...

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  •  Environmental Studies Factsheet: 149. Conservation Case Studies: Frogs

    Environmental Studies Factsheet: 149. Conservation Case Studies: Frogs

    This Factsheet:• Describes the importance of frog conservation• Uses Case Studies of frog conservation studies to illustrate How Science Works...

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  •  Environmental Studies Factsheet: 150. Is Thorium the answer to our energy needs?

    Environmental Studies Factsheet: 150. Is Thorium the answer to our energy needs?

    This Factsheet:• Explains the advantages of thorium over uranium as a nuclear fuel• Describes the technology that is being suggested• Outlines the potential problems facing this new tec...

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