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22.7.15


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  1. Water pollution: Rivers and seas take a long time to recover from the effects of careless human treatment. What causes pollution and what can we do to stop it?
  2. Electricity: The most versatile and useful form of energy in our world, electricity is going to become a whole lot more important in future.
  3. Nanotechnology: Can we build a brave new world just by shuffling atoms and molecules under a microscope?
  4. Magnetism: One of the first bits of science people studied, magnetism is still just as relevant today in everything from electric cars to body scans at the hospital.
  5. Gears: Wheels with teeth carved around them can make you go faster or bump up your power—and here's how!
  6. Wind turbines: Why does a wind turbine have to be so tall—and what keeps the lights on if the breeze stops blowing?
  7. Batteries: We all need electricity, wherever we happen to be, so thank goodness for batteries—miniature power plants you can carry in your pocket!
  8. Electric motors: These amazing machines turn electricity and magnetism into movement, powering everything from handheld toothbrushes to bikes, cars, and trains.
  9. Air pollution: It's often invisible, but air pollution can be just as damaging as water pollution and sometimes travels much further. What causes it—and how can we clean up our act?
  10. Global warming: Why is the world getting hotter and what can we do about it? What will be the consequences for humankind and the rest of the living world?
  11. Cloud computing: Why buy yourself an expensive computer or programs to go with it when you can get access to something just as good over the Internet?

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