ahlam1399
04-07-2016, 02:09 AM
Lead, the "useful metal," was the pride of the Romans. For the last 5,000 years, it was used in products ranging from water pipes and makeup to wine ? until we discovered how poiso**us it is.
أكثر... (http://www.npr.org/2016/04/06/473268312/before-it-was-dangerous-lead-was-the-miracle-metal-that-we-loved?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/2016/04/06/473268312/before-it-was-dangerous-lead-was-the-miracle-metal-that-we-loved?utm_medium=RSS&utm_campaign=news)