The chemical sciences.
D002621:Chemistry / Q000266:history; D004787:Environmental Pollution / Q000517:prevention & control; D005579:Fossil Fuels; D049690:History, Ancient; D049691:History, Medieval; D049711:History, Modern 1601-; D006801:Humans; D009678:Nuclear Energy; D010684:Philosophy; D011158:Population Growth; D012938:Social Perception; D012940:Social Problems; D013672:Technology
D005579:Fossil Fuels