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This WHO policy brief presents the consequences of lead exposure on human health and details its toxicity in the body system explaining why it is important to reduce the use and releases of lead, and to reduce environmental and occupational exposures, particularly for children and women of childbearing age.The policy brief also lists the sources of lead releases and contamination in industrial process, drinking water and domestic sources. The brief also gives guidelines for tolerable intake levels of lead and

Since the global phase-out of leaded petrol, reports have suggested that lead exposure remains substantial or is increasing in some low-income and middle-income countries (LMICs). However, few studies have attempted to systematically assess blood lead levels over the full range of LMICs. This study is aimed to describe values for blood lead level in LMICs.In this systematic review, PubMed was searched for studies published between Jan 1, 2010, and Oct 31, 2019, that reported blood lead levels in the 137

The production and use of nanoparticles leads to the emission of manufactured or engineered nanoparticles into the environment. Those particles undergo many possible reactions and interactions in the environment they are exposed to. These reactions and the resulting behavior and fate of nanoparticles in the environment have been studied for decades through naturally occurring nanoparticulate (1-100 nm) and colloidal (1-1000 nm) substances. The knowledge gained from these investigations is nowhere near sufficiently complete to create a detailed model of the

The present review covers developments in studies of nanomaterials (NMs) in the environment since our much cited review in 2008. We discuss novel insights into fate and behavior, metrology, transformations, bioavailability, toxicity mechanisms, and environmental impacts, with a focus on terrestrial and aquatic systems. Overall, the findings were that: 1) despite substantial developments, critical gaps remain, in large part due to the lack of analytical, modeling, and field capabilities, and also due to the breadth and complexity of the area