The most useful invention

THE ELECTRICITY

I think the electricity has been the most useful invention ever.

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It was created by Thomas Alva Edison, a very important inventor.

Thanks to this, we can have light, heat and a lot of other things.

Can you imagine how your life would be like without electricity?

The applications for the electricity are increasing everyday, for example: 

ELECTRIC CARS! :O

They only need electricity to work!