Medicine, minerals and Malthus.
D004781:Environmental Exposure; D006801:Humans; D007854:Lead; D008903:Minerals; D009784:Occupational Diseases; D009787:Occupational Medicine; D011153:Population; D011850:Radioactive Waste; D011851:Radioactivity; D012834:Silver; D013672:Technology
D008903:Minerals; D011850:Radioactive Waste; D007854:Lead; D012834:Silver