sity of Technology, Akure approved the study protocols. The authors declare no competing financial interests. The authors declare no competing financial interests. India is the fifth biggest producer of e-waste in the world, discarding 1.7 million tons in 2014. E-waste gets recycled mainly in the informal sector which means activities are largely unaccounted for. Hazardous chemicals and metals are released during recycling processes (lead (Pb) being the most common). Compared to other developing countries, there are few studies from India on the awareness of recyclers of health risks related to e-waste recycling. The aim of the present study was to assess the knowledge, attitudes, and practices (KAP) of health-related risks and behaviors among e-waste workers/recyclers belonging to the informal sector in Delhi and to determine the concentration of Pb levels in hair samples from a subset of workers from selected recycling sites. A cross-sectional study was conducted in three e-waste informal recycling sites of Delhi Seelampur, Mustafabad and Mandoli using an interviewer administered questionnaire among 220 e-waste workers. Percentages were presented for each KAP inpriority. Obtained. Ethics approval was obtained from the Institutional Ethical Committee (IEC), Indian Institute of Public Health-Delhi. The authors declare no competing financial interests. The authors declare no competing financial interests. The rise in particulate matter (PM) concentrations is a serious problem for the environment. https://www.selleckchem.com/Proteasome.html Heavy metals associated with PM , PM , and road dust adversely affect human health. Different methods have been used to assess heavy metal contamination in PM , PM , and road dust and source apportionment of these heavy metals. These assessment tools utilize pollution indices and health risk assessment models. The present study evaluates the total mass and average concentrations of heavy metals in PM , PM , and road dust along selected road networks in Dhanbad, India, analyzes the source apportionment of heavy metals, and assesses associated human health risks. A total of 112 PM samples and 21 road dust samples were collected from six stations and one background site in Dhanbad, India from December 2015 to February 2016, and were analyzed for heavy metals (iron (Fe), lead (Pb), cadmium (Cd), nickel (Ni), copper (Cu), chromium (Cr), and zinc (Zn)) using atomic absorption spectrophotometry. Source apportionmheavy metals in the present study, children were more affected than adults. The carcinogenic risk posed by the heavy metals was negligible. The authors declare no competing financial interests. The authors declare no competing financial interests. Heavy metals are usually present in trace amounts in various environmental media such as water, soil, and air, and many are poisonous to human health even at very low concentrations. To assess the risk of heavy metal contamination of water, soil, and plants around a used lead acid battery (ULAB) recycling center in Ibadan, Nigeria. Environmental samples (water, soil, and plants) were collected using standard methods and concentrations of arsenic (As), cadmium (Cd), antimony (Sb), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), selenium (Se), and zinc (Zn) were determined using inductively coupled plasma-optical emission spectrometry at the International Institute of Tropical Agriculture, Ibadan, Nigeria. The concentration of metals detected in water samples were higher than permissible limits at more than 50% of the sampling locations. In contrast, heavy metals in soil were within permissible limits. Most of the heavy metals except Pb were found to be present in the plant within permissible limits. Lead levels in water and plants from all locations exceeded the permissible limits. The contamination degree and pollution load index of water sources around the ULAB recycling center indicate a high degree of pollution of water sources with heavy metals, while soil samples were within the normal baseline levels. The transfer factor of Pb from soil to was 1.92. This has implications for human health as the plant is often harvested and for sale in local markets as a source of food and medicine. The present study recommends improved technology for ULAB recycling and adequate treatment of effluent/runoff from recycling centers before discharge. The authors declare no competing financial interests. The authors declare no competing financial interests. There is no safe level of human exposure to lead (Pb). Detecting common early symptoms of low threshold Pb poisoning can help to prevent the damaging effects of higher doses and chronic low dose exposures. Panel beaters or auto body mechanics are exposed to Pb through their occupational duties. The present study aimed to determine common early symptoms associated with lower threshold Pb poisoning among roadside and organized panel beaters in Enugu Metropolis, Nigeria. This was a comparative cross-sectional study of 428 panel beaters in Enugu metropolis. A multi-stage sampling method was used to select 214 respondents each from the roadside and organized sectors. A semi-structured interviewer-administered questionnaire was used for data collection. Samples were collected under aseptic procedures. Blood Pb samples were extracted using the conventional wet acid digestion method and analyzed using a flame atomic absorption spectrometer (wavelength 283.3 nm). Comparative analysis was performed using the chi - square and Mann-Whitney U test. Statistical significance was set at P < 0.05. Median Pb levels were 3.0 ug/dL and 16.0 ug/dL among roadside and organized panel beaters, respectively, with a significant difference. Numbness of limbs (P = 0.010) and fatigue (χ = 5.294, P = 0.023) were found to be associated with roadside panel beaters, while weakness (χ = 6.185, P = 0.019) and fatigue (χ = 4.206, P = 0.046) were associated with organized panel beaters. Nonspecific constitutional symptoms were common early symptoms of Pb poisoning irrespective of workplace occupational practices. These symptoms will help in early detection and control of occupational lead exposures. Obtained. Ethics approval was obtained from the Health Research Ethics Committee of the University of Nigeria Teaching Hospital, Ituku Ozalla, Enugu. The authors declare no competing financial interests. The authors declare no competing financial interests.