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Where should we go first? Let's go a train station first!
Alright class, this is a train. Trains used to be powered by burning coal. When you burn coal, the smoke goes into our atmosphere, which we use to breathe. This is an example of a negative energy source. Let's head on to the beach!
This is the ocean. Water is another source of energy which we can use. It's clean, free, and it will never run out. But it costs a lot to use. This is a positive resource. Let's go to a meadow next.
This is a meadow. Meadows and valleys sometimes have wind farms, which create energy from the wind. This is a positive energy source because it's free, and it can't run out. Also, it doesn't hurt anybody. Next let's go watch the sun set.
The sun also is a positive energy source, it's free, clean, and powerful, the only downside is that it costs a lot to harness the energy.
Alright class, let's head back to school.
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