Robuta

https://www.uspto.gov/web/patents/classification/cpc/html/defC01B.html
metallic elementscpcdefinitionnoncompounds
https://www.usgs.gov/publications/spatial-and-temporal-heterogeneity-metallic-elements-industrialized-aquatic-bird
This study examined the potential for exposure of migratory aquatic birds to contaminants in highly industrialized habitats at Baltimore Harbor, Maryland....
metallic elementsspatialtemporalheterogeneityindustrialized