Trace metals such as cadmium are found in high concentrations in urban environments. Animal and plant populations living in heavily contaminated environments could adapt to trace metals exposure. A recent study shows that urban populations of the acorn ant Temnothorax nylanderi are more resistant to cadmium than their forest counterparts. https://www.bekindtopets.com/super-find-Eagles-MOJO-19-Premium-Laptop-Backpack-deal-zone/