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  • Environmental Studies Factsheet: 20. Wind Energy

    Environmental Studies Factsheet: 20. Wind Energy

      Why wind? 1. Important way of helping us meet our CO2 reduction targets. 2. Electricity demand greatest in Winter. Most electricity from wind is available November-April. 3. Potential ...

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  • Environmental Studies Factsheet: 21. Control of Air Pollution

    Environmental Studies Factsheet: 21. Control of Air Pollution

      Controlling pollution General methods Most air pollution in the UK comes from burning fossil fuels so the easiest way to decrease emissions is to burn less coal, oil, gas, petrol and&nb...

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  • Environmental Studies Factsheet: 22. Desalination

    Environmental Studies Factsheet: 22. Desalination

        Desalination is an ancient technique. In its simplest form desalination involves distillation - heating water and condensing the steam. All of the impurities are left behind ...

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  • Environmental Studies Factsheet: 23. Reducing Noise Pollution

    Environmental Studies Factsheet: 23. Reducing Noise Pollution

      Noise causes stress and stress is a major cause of illness. Very loud noises cause permanent damage to hearing (Factsheet 130 Noise Pollution). The actual loudness of a sound is...

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  • Environmental Studies Factsheet: 24. The Chi-squared Test for Association

    Environmental Studies Factsheet: 24. The Chi-squared Test for Association

      The chi-squared test for association (or association index or chi-squared contingency tables) is commonly used in projects to measure whether two factors are associated (e.g. whether grea...

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  • Environmental Studies Factsheet: 25. Investigations: Basic Principles

    Environmental Studies Factsheet: 25. Investigations: Basic Principles

      A student decided to investigate the effect of zero cultivation on soil properties. They had read about an organic farmer who had not mechanically altered the soil in an arable field for ...

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  • Environmental Studies Factsheet: 26. GM Farm Scale Evaluation Trials

    Environmental Studies Factsheet: 26. GM Farm Scale Evaluation Trials

      In October 2003 the government announced the long-awaited results of its controversial farm scale investigations into GM crops. These were the trials that outraged environmentalists,...

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  • Environmental Studies Factsheet: 27. Biological Oxygen Demand

    Environmental Studies Factsheet: 27. Biological Oxygen Demand

      What is it? It is the amount of oxygen used by organisms in a body of water over a specified time period. By definition, aerobic organisms use oxygen in respiration. The more organi...

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  • Environmental Studies Factsheet: 28. Bauxite

    Environmental Studies Factsheet: 28. Bauxite

      Bauxite is an example of an ore – a rock that contains economically important quantities of a mineral. Bauxite contains several aluminium hydroxide minerals, from which valuabl...

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  • Environmental Studies Factsheet: 29. The Properties Of Pollutants

    Environmental Studies Factsheet: 29. The Properties Of Pollutants

      The older pesticides such as DDT, which are often incorrectly described as non-biodegradable, can be broken down but only very slowly; the half-life of DDT was 20 years. More mo...

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