Partikiller

“Monsanto said … it had no information relating to a change in the marketing authorisation for [the herbicide] Roundup and that there was no new scientific data available to challenge it.
‘Under the conditions recommended on the label, the product does not present any particular risk for the user.'” (http://uk.reuters.com/article/2015/06/14/us-france-monsanto-idUKKBN0OU0W620150614)

Your particles are safe.

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Fraxic

“Unconventional oil and natural gas [fracking] operations release large amounts of reproductive, immunological, and neurological toxicants, carcinogens as well as endocrine disrupting chemicals (EDCs) into the environment that may negatively affect human health.” (http://www.theecologist.org/News/news_round_up/2677207/miscarriage_and_stillbirth_linked_to_fracking_chemical_exposure.html)

The inconvenience of any such negative effects is generously compensated by the cash that fracking companies offer local communities.