The National Guard released 40 PPM phosgene gas into the atmosphere when they deliberately burned the toxic chemicals. Per the CDC, 5 PPM is "probably lethal": https://www.cdc.gov/niosh/idlh/75445.html#:~:text=It%20has%20been%20stated%20that,minute%20exposure%20%5BJacobs%201967%5D.
The National Guard released 40 PPM phosgene gas into the atmosphere when they deliberately burned the toxic chemicals. Per the CDC, 5 PPM is "probably lethal": https://www.cdc.gov/niosh/idlh/75445.html#:~:text=It%20has%20been%20stated%20that,minute%20exposure%20%5BJacobs%201967%5D.
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