While we all enjoy cleaner air and less airborne particulate matter is always better than more, public health policies must be based on demonstrated human health benefits.
Reducing tumors in laboratory mice is not one of them
Because of the journal’s (Nature) publication paywall, we are limited to the study’s abstract. Chief among the missing detail is any description of the PM2.5 exposures involved, such as duration, frequency, concentration, or composition, or whether the particles were collected from ambient sampling filters or produced in a laboratory. The abstract only says that “4 within-country cohorts...