who is the best person to use to advertise solar panel?

so, okay, i'm doing a project in my economic class, and i must choose a product to sell, and the product must be profitable.
so i chose Solar panels as the product i'm selling. but the project has to have both persuasive and informative advertising methods. i'm having a hard time finding a famous person to advertise my product. the person that's in my mind right now is Al Gore.
Is there anyone else i could use to advertise the solar panel, my products?
thanks a lot!

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