Lead is increasingly found in drinking water in many parts of {HEAD ~ the world} stemming from industrial processes as well as {TAIL ~ geochemical mechanisms}, it is regarded as highly toxic metal ions to a wide variety of organs in both humans and animals, including nervous, immune, reproductive, gastrointestinal systems 
stemming from
Lead is increasingly found in drinking water in many parts of { HEAD ~ the world } stemming from industrial processes as well as { TAIL ~ geochemical mechanisms } , it is regarded as highly toxic metal ions to a wide variety of organs in both humans and animals , including nervous , immune , reproductive , gastrointestinal systems
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