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A two milligram dose of fentanyl powder (on pencil tip) is a lethal amount for most people. [59] Overall, drug overdose deaths in the United States rose from 2019 to 2021 with more than 106,000 drug overdose deaths reported in 2021.
Particulates or atmospheric particulate matter (see below for other names) are microscopic particles of solid or liquid matter suspended in the air.The term aerosol refers to the particulate/air mixture, as opposed to the particulate matter alone, [1] though it is sometimes defined as a subset of aerosol terminology. [2]