Do your remember when someone first cautioned you to not eat the yellow snow? Likely referring to how urine will discolor snow in a yellow hue, check out the following publication using snow as a bioindicator of toxic metal pollution near a metal shredder in Winnipeg Ontario.
Solademi, Folarin, and Shirley Thompson. 2020. “Spatial Analysis of Heavy Metal Emissions in Residential, Commercial and Industrial Areas Adjacent to a Scrap Metal Shredder in Winnipeg, Canada.” Journal of Geoscience and Environment Protection 08 (05): 359. https://doi.org/10.4236/gep.2020.85023.
Looks like our heat maps derived from varying lead concentrations in moss suggesting metal shredding and recycling operations are a source of overlooked toxic metal air pollution.
Lead heat map of toxic air pollution in Seattle’s Duwamish River Valley. Metal shredding and recycling operations were near the epicenter of our two hotspots!