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i made a post about this a while ago. in it i included some discussion of spectroscopy and how to use it to discover what is in the sky near you. i need to post an update of it with some of the comments and replies. i've also been working on a post about detox of some of the elements found in the atmosphere. check it out here if you want:
https://steemit.com/geoengineering/@lifeworship/chemtrails-the-truth-and-the-conspiracy-theory
some of the best parts are in the comments.

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