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