by who? NBC?
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And that may only apply to specific plants such as carnivorous ones. They actually have basic function. Don't believe everything just cus its from a trustable source.
I believe in ww2, The Nazi party was heading to invade Poland but found around 20k polish corpses and they said it was Russia's doing. Russia was liek no but russia really did it!!
Moral of the story, do your own research on the subject or simply make observations before you argue.