Daily Archives: November 24, 2015

Drinking Water and Health Risks, Chenzhou City, China

Huang X, He L, Li J, Yang F, Tan H. Different Choices of Drinking Water Source and Different Health Risks in a Rural Population Living Near a Lead/Zinc Mine in Chenzhou City, Southern China. International Journal of Environmental Research and Public Health 2015 Nov 12;12(11):14364-81. doi: 10.3390/ijerph121114364.

This study aimed to describe the households’ choices of drinking water sources, and evaluate the risk of human exposure to heavy metals via different drinking water sources in Chenzhou City of Hunan Province, Southern China. A cross-sectional face-to-face survey of 192 householders in MaTian and ZhuDui village was conducted. The concentrations of heavy metals in their drinking water sources were analyzed. Carcinogenic and non-carcinogenic risk assessment was performed according to the method recommended by the United States Environmental Protection Agency. In total, 52.60% of the households used hand-pressed well water, and 34.89% used barreled water for drinking. In total, 6.67% of the water samples exceeded the Chinese drinking water standards. The total health risk of five metals is 5.20 × 10(-9)~3.62 × 10(-5). The total health risk of five metals was at acceptable levels for drinking water sources. However, the total risk of using hand-pressed well water’s highest value is 6961 times higher than the risk of using tap water. Household income level was significantly associated with drinking water choices. Arsenic (As) and lead (Pb) are priority controlled pollutants in this region. Using safe drinking water (tap water, barreled water and so on) can remarkably reduce the risk of ingesting heavy metals.

Gun Control Laws Will Not Stop This Type of Terrorism

“According to the indictment of Shannon Miles, the motive for the alleged killing of a Harris County deputy was for the deputy’s service as a member of law enforcement. The man accused of executing Deputy Darren Goforth by walking up behind him at a gas station and unloading 15 rounds into his head and back was indicted on Monday.” click here

Carbon Dioxide Removal by Natural Sinks Described by First-Order Decay

Halperin Ari, 2015. Simple Equation of Multi-Decadal Atmospheric Carbon Concentration Change, defyccc.com, defyccc.com/se

Surplus CO2 is removed from the atmosphere by natural sinks at rate, proportional to the surplus CO2 concentration. In other words, it undergoes exponential decay with a single decay constant. This conclusion is rigorously proven, using first principles and relatively recent observations of oceans. Historical data for CO2 concentrations and emissions from 1958–2013 are then used to calculate the half-life of the surplus concentration. This theoretically derived formula is found to be an excellent match to the historical CO2 concentrations over the measurement period. Furthermore, the “initial” CO2 concentration in the formula came out to be very close to the likely “pre-industrial” CO2 concentration. Based on the used datasets, the half-life of the surplus concentration of CO2 in the atmosphere is found to be approximately 40 years. click here for the full paper.


Exposure to inorganic arsenic by food

Gundert-Remy U, Damm G, Foth H, Freyberger A, Gebel T, Golka K, Röhl C, Schupp T, Wollin KM, Hengstler JG. High exposure to inorganic arsenic by food: the need for risk reduction. Archives of toxicology. 2015 Nov 19.

Arsenic is a human carcinogen that occurs ubiquitously in soil and water. Based on epidemiological studies, a benchmark dose (lower/higher bound estimate) between 0.3 and 8 μg/kg bw/day was estimated to cause a 1 % increased risk of lung, skin and bladder cancer. A recently published study by EFSA on dietary exposure to inorganic arsenic in the European population reported 95th percentiles (lower bound min to upper bound max) for different age groups in the same range as the benchmark dose. For toddlers, a highly exposed group, the highest values ranged between 0.61 and 2.09 µg arsenic/kg bw/day. For all other age classes, the margin of exposure is also small. This scenario calls for regulatory action to reduce arsenic exposure. One priority measure should be to reduce arsenic in food categories that contribute most to exposure. In the EFSA study the food categories ‘milk and dairy products,’ ‘drinking water’ and ‘food for infants’ represent major sources of inorganic arsenic for infants and also rice is an important source. Long-term strategies are required to reduce inorganic arsenic in these food groups. The reduced consumption of rice and rice products which has been recommended may be helpful for a minority of individuals consuming unusually high amounts of rice. However, it is only of limited value for the general European population, because the food categories ‘grain-based processed products (non rice-based)’ or ‘milk and dairy products’ contribute more to the exposure with inorganic arsenic than the food category ‘rice.’ A balanced regulatory activity focusing on the most relevant food categories is required. In conclusion, exposure to inorganic arsenic represents a risk to the health of the European population, particularly to young children. Regulatory measures to reduce exposure are urgently required.

Release of NOAA Records Necessary to Assess Validity of Whistleblower Claims

Federal law protects the rights of whistleblowers. Their claims must be taken seriously by the Obama Administration.

“….a groundbreaking global warming study was “rushed to publication” over the objections of numerous scientists at the National Oceanic and Atmospheric Administration.”

“…whistleblowers have come forward with new information on the climate study’s path to publication in June.The study refuted claims that global warming had “paused” or slowed over the past decade, undercutting a popular argument used by those who refute the scientific consensus that man-made pollution is behind global warming.”

click here