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Primary Focus Geography - Green Power Clips

  1. How useful are wind turbines?

    Duration: 00:43

  2. How do we get electricity from water?

    Duration: 01:20

  3. Green energy - wind and solar power

    Duration: 01:51

  4. How does a windmill work?

    Duration: 01:26

  5. How does a water wheel work?

    Duration: 02:23