Fluoride and tea

I'm doing research on a documentary and I came up with many sites and pages that green tea/black tea has 50 (+/-)ppm more than municipal water, of fluoride due to pollution and modern fertilizer as this plant uptakes it more than any other. I have read studies from South America to Japan. Therefore, is it not good to drink that fabulous green tea? Is it worth the amount of fluoride? Have I poisoned myself by drinking 3 cups a day for months? Help.

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