I have this project in science and I need to make a model that will use renewable energy , it’s easy to make , and it actually works.The model has to median not too big and not too small.It’s also going to need a really good explanation because I’m going to have to demonstrate it in front of my class and it’s a big part of my grade. Thanks for the help!

Best answer:

Answer by v1362
You can make a windmill like iranian ones in smaller size.
these are oldest windmills in the world and can be rebuilt to generate electricity.
most required substance is wood or it can be made of lighter one.

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