“…Though there is no known safe level of Pb exposure, however, a substantially high blood Pb level can result in adverse health effects (U.S CDC Advisory Committee, 2012, Zahran, et al, 2013. The average concentration of Pb in surface soils worldwide is 32 ppm but varies from 10 ppm to 67 ppm (Pendias, et al, 2001;Wuana et al, 2011;Gunatilake, et al, 2014). Studies have shown that plants do not readily take up Pb from soils, however, in soils that have high Pb content, significant levels of Pb have been found in roots of plants growing in such soils (Wuana, et al, 2011;Alvarez-Ayuso, et al, 2012).…”