Environmental Engineer at Envo Projects,Delhi,India.www.envoprojects.com I am collecting Articles i found interesting here so that i can read them at my leisure later on.This blog is for my own self improvement.TO AVOID COPYRIGHT VIOLATIONS, ALL POSTS ARE SHOWN ALONG WITH SOURCES FROM WHERE ITS TAKEN.PLEASE CONTACT ME IF YOU ARE THE AUTHOR AND YOUR NAME IS NOT DISPLAYED IN THE ARTICLE. +918076071358(WHATSAPP)