Monthly Archives: May 2016

Fossil Fuels Not the Primary Cause of Global Warming

“MANKIND’S burning of fossil fuels may not be the primary cause of global warming, according to the shock results of a new study by scientists behind the Large Hadron Collider (LCH).” click here

Evaluation of Neighborhood Treatment for Potable Water, Mexico

Vero´nica Corella-Baruda , Kristina D. Menab, Shawn G. Gibbsb , Patrick L. Gurianc and Alberto Baruda.  Evaluation of neighborhood treatment systems for potable water supply International Journal of Environmental Health Research Vol. 19, No. 1, February 2009, 49–58

Piped water is available in Ciudad Jua´rez, Chihuahua, Me´xico, but residual disinfectant is not reliably found in the public drinking water supply. Lack of confidence in the public supply leads many residents to rely on bottled water. To provide consistent disinfection, two health clinics were equipped with ultraviolet disinfection systems, and neighboring households were encouraged to obtain their drinking water from the treatment systems. Use of the treated water declined from 62% of self-selected study participants at the time of the first visit to 40% at the second visit. During the first visit, diarrhea prevalence was similar among households using treated water and other water sources yet diarrhea prevalence was higher among households using the treated water during the second visit. Microbiological quality of the treated water in the homes was not demonstrably superior to that of other sources.

Water Fluoridation and Bone Fracture Risk

It seems that these researchers may not be fully aware of how assumptions drive if not determine their conclusions. 

P. Näsman, J. Ekstrand, F. Granath, A. Ekbom, C.M. Fored. Estimated Drinking Water Fluoride Exposure and Risk of Hip Fracture: A Cohort Study. Journal of Dental Research, Nov 2013; 92(11): 1029-1034.

The cariostatic benefit from water fluoridation is indisputable, but the knowledge of possible adverse effects on bone and fracture risk due to fluoride exposure is ambiguous. The association between long-term (chronic) drinking water fluoride exposure and hip fracture (ICD-7-9: ‘820’ and ICD-10: ‘S72.0-S72.2’) was assessed in Sweden using nationwide registers. All individuals born in Sweden between January 1, 1900 and December 31, 1919, alive and living in their municipality of birth at the time of start of follow-up, were eligible for this study. Information on the study population (n = 473,277) was linked among the Swedish National In-Patient Register (IPR), the Swedish Cause of Death Register, and the Register of Population and Population Changes. Estimated individual drinking water fluoride exposure was stratified into 4 categories: very low, < 0.3 mg/L; low, 0.3 to 0.69 mg/L; medium, 0.7 to 1.49 mg/L; and high, ≥ 1.5 mg/L. Overall, we found no association between chronic fluoride exposure and the occurrence of hip fracture. The risk estimates did not change in analyses restricted to only low-trauma osteoporotic hip fractures. Chronic fluoride exposure from drinking water does not seem to have any important effects on the risk of hip fracture, in the investigated exposure range.

Burkholderia pseudomallei in Drinking Water, Thailand

Direk Limmathurotsakul, Gumphol Wongsuvan, David Aanensen, Sujittra Ngamwilai, Natnaree Saiprom, Patpong Rongkard, Janjira Thaipadungpanit, Manas Kanoksil, Narisara Chantratita, Nicholas P.J. Day, and Sharon J. Peacock. Melioidosis Caused by Burkholderia pseudomallei in Drinking Water, Thailand, 2012. Emerging Infectious Diseases Vol. 20, No. 2, February 2014 DOI: http://dx.doi.org/10.3201/eid2002.121891

We identified 10 patients in Thailand with culture confirmed melioidosis who had Burkholderia pseudomallei isolated from their drinking water. The multilocus sequence type of B. pseudomallei from clinical specimens and water samples were identical for 2 patients. This finding suggests that drinking water is a preventable source of B. pseudomallei infection.

 

Antarctic Sea Level Rise False Alarm

The alarming estimates from this new Nature paper, particularly as represented by the media, are grievously wrong both with respect to the amount of and the rate of sea level rise that might be associated with melting of the EIAS Totten glacier. click here

Association of Fluoride in Water and Chronic Pain, Thailand

Montakarn Namkaew, Phongtape Wiwatanadate. Association of fluoride in water for consumption and chronic pain of body parts in residents of San Kamphaeng district, Chiang Mai, Thailand  Tropical Medicine and International Health Volume 17 no 9 pp 1171–1176 September 2012 doi:10.1111/j.1365-3156.2012.03061.x

Objective: To assess the dose response of fluoride exposure from water and chronic pain.

Methods: Using a retrospective cohort design, the study was conducted in two sub-districts of San Kamphaeng district, Poo-kha and On-tai. Five hundred and thirty-four residents aged ‡50 years of age were interviewed about their sources of drinking water and assessed for chronic pain. Each water source was sampled for fluoride measurement, from which the average daily fluoride dose was estimated. Binary logistic regression with forward stepwise (likelihood ratio) model selection technique was used to examine the association between the average daily fluoride dose and chronic pain.

Results: We found associations between the average daily fluoride dose and lower back pain [odds ratio (OR) = 5.12; 95% confidence interval (CI), 1.59–16.98], and between the high fluoride area vs. the low fluoride area (OR = 1.58; 95% CI, 1.10–2.28; relative risk = 1.22 with 95% CI, 1.14–1.31) to lower back pain. Other risk factors, such as family history of body pain and a history of injury of the lower body, were also associated with lower back pain. However, there were no relationships between the average daily fluoride dose and leg and knee pains.

Conclusion: To prevent further lower back pain, we recommend that the water in this area be treated to reduce its fluoride content.

 

Ivanpah Solar Electric Generating Station Becomes an Albatross?

“The blaze at the Ivanpah Solar Electric Generating System in the Mojave Desert broke out around 9:30 a.m., according to the San Bernardino County Fire Department. In a Facebook post, officials said that flames could be seen near the ninth floor of the Unit 3 tower, but that they had apparently died out by the time firefighters arrived.” click here