Rich in phosphates, this waste matter left by bats & seabirds can be a valuable commodity
43 ... ing 
South America's potential for fertilizer-mineral production will go far toward 
meeting... [DOC] [TLE] Final review of scientific information on cadmium - UNEP [PAR] The handling of wastes may lead to elevated local and re- .... relatively high 
levels of cadmium in seabirds and marine mammals in ..... values for cadmium 
concentration in phosphate fertilizers.