Ariya, who led the study, said she did not "wish to be alarmist," but "as a mother who is an atmospheric physical chemist, I definitely do not suggest my young kids eat snow in urban areas in general.
"The study examined how snow interacts with pollutants from car exhaust in the air. Findings showed that snow pulled pollutants like benzene, ethylbenzene, toluene and xylenes from the air. The amount of pollutants concentrated in the snow increased dramatically.
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"Without considering snow and ice, one will not be able to properly evaluate the effect of exhaust emission, and subsequently health and climate impacts, for the cities which receive snow," Ariya said.
"Further research is recommended to address various aspects of such experiments under various environmental conditions, for adequate implementation in future modeling."
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