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What did the first steams engines burn to heat water?
Coal
When did engineers build the diesel locomotive?
1900s
Who invented the first high speed electric trains?
Japanese
Which invention came first, the typewriter or the computer?
the typewriter
When were laptops invented?
1980s
Hundreds of years ago, people invented _______ and _______.
watermills, windmills
What do you use the power of water and wind for now?
electricity
Wind energy is _______ and does not contaminate the enviroment.
renewable
