Air Pollution: The Billion Dollar Industry
September 13, 2016 07:21 AM - Steve Williams, Care2
The World Bank has released a new report highlighting the fact that air pollution costs world governments billions upon billions every year and ranks among the leading causes of death worldwide.
The estimates — drawn from a number of sources, including the World Health Organization’s most recently completed data sets compiled in 2013 — can for the first time begin to examine the overall welfare cost of air pollution.
Healthcare costs for infections linked to bacteria in water supply systems are rising
September 12, 2016 10:38 AM - Tufts University via EurekAlert!
A new analysis of 100 million Medicare records from U.S. adults aged 65 and older reveals rising healthcare costs for infections associated with opportunistic premise plumbing pathogens--disease-causing bacteria, such as Legionella--which can live inside drinking water distribution systems, including household and hospital water pipes.
A team led by researchers from the Friedman School of Nutrition Science and Policy at Tufts University and Tufts University School of Medicine found that between 1991 and 2006, more than 617,000 hospitalizations related to three common plumbing pathogens resulted in around $9 billion in Medicare payments--an average of $600 million a year. The costs may now exceed $2 billion for 80,000 cases per year, write the study authors. Antibiotic resistance, which can be exacerbated by aging public water infrastructure, was present in between one and two percent of hospitalizations and increased the cost per case by between 10 to 40 percent.
Study Discovers Air Pollution Particles in the Human Brain
September 9, 2016 07:21 AM - Julie Rodriguez, Care2
A new study from Lancaster University has discovered toxic nanoparticles from air pollution in large quantities in human brains. The researchers examined brain tissue from 37 people aged between 3 and 92 years old in the U.K. and Mexico. Magnetite, a type of iron oxide, was found in massive quantities in the samples – millions of particles per gram of brain tissue.
Increased ocean acidification is due to human activities, say scientists
September 8, 2016 05:24 PM - Massachusetts Institute of Technology via ScienceDaily
Oceanographers from MIT and Woods Hole Oceanographic Institution report that the northeast Pacific Ocean has absorbed an increasing amount of anthropogenic carbon dioxide over the last decade, at a rate that mirrors the increase of carbon dioxide emissions pumped into the atmosphere.
The scientists, led by graduate student Sophie Chu, in MIT's Department of Earth, Atmospheric, and Planetary Sciences, found that most of the anthropogenic carbon (carbon arising from human activity) in the northeast Pacific has lingered in the upper layers, changing the chemistry of the ocean as a result. In the past 10 years, the region's average pH has dropped by 0.002 pH units per year, leading to more acidic waters. The increased uptake in carbon dioxide has also decreased the availability of aragonite -- an essential mineral for many marine species' shells.
Tropics told to ban coral-killing sunscreen
September 8, 2016 06:57 AM - Inga Vesper, SciDevNet
Tropical island nations should team up to ban coral-killing sunscreen products, following the example of Hawaii, a conference has heard. Chemical compounds in sunscreen lotions cause irreparable damage to reefs, which are crucial to the livelihoods of 500 million people in the tropics, scientist and policymakers said at the IUCN World Conservation Congress on 3 September. Hawaii is leading a legistlative effort to ban the use of sunscreen that contains oxybenzone or similar harmful agents at its beaches.
Toxic air pollution nanoparticles discovered in the human brain
September 7, 2016 09:46 AM - Oxford University
A team involving Oxford University scientists has, for the first time, discovered tiny magnetic particles from air pollution lodged in human brains – and researchers think they could be a possible cause of Alzheimer's disease.
Researchers led by Lancaster University found abundant magnetite nanoparticles in the brain tissue of 37 individuals aged three to 92 who lived in Mexico City and Manchester. This strongly magnetic mineral is toxic and has been implicated in the production of reactive oxygen species (free radicals) in the human brain, which are associated with neurodegenerative diseases including Alzheimer's disease.
The results have been published in the journal Proceedings of the National Academy of Sciences.
Cows in glass tanks help to reduce methane emissions
August 30, 2016 04:44 PM - Natural Resources Institute Finland via ScienceDaily
In the future, the breeding of the climate-friendly cow can be speeded up by using genetic information. A recent study identifies areas in the cow's genotype which are linked to the amount of methane it produces. Cows subjected to study did not unnecessarily chew their cuds when being placed in glass cases.
Of the greenhouse gases produced by humans, 16 per cent consists of methane, of which one third originates in cattle production: more than one billion cattle graze the planet, and each of them emit around 500 litres of methane every day, thereby warming up the climate.
Could it be possible to produce a cow with lower methane emissions through the means available for breeding? The genotype and feed affect a cow's microbial make-up and functioning. Microbes in the cow's intestine and rumen on their part play a key role in the functioning of the cow's entire biological system. "A similar interaction was previously detected in humans," says Johanna Vilkki, professor at Luke.
Study finds shark fins & meat contain high levels of neurotoxins linked to Alzheimer's disease
August 29, 2016 04:45 PM - University of Miami Rosenstiel School via EurekAlert!
In a new study, University of Miami (UM) scientists found high concentrations of toxins linked to neurodegenerative diseases in the fins and muscles of 10 species of sharks. The research team suggests that restricting consumption of sharks can have positive health benefits for consumers and for shark conservation, since several of the sharks analyzed in the study are threatened with extinction due to overfishing.
Fins and muscle tissue samples were collected from 10 shark species found in the Atlantic and Pacific Oceans for concentrations of two toxins--mercury and β-N-methylamino-L-alanine (BMAA). "Recent studies have linked BMAA to neurodegenerative diseases such as Alzheimer's disease and amyotrophic lateral sclerosis (ALS)," said Deborah Mash, Professor of Neurology and senior author of the study.
UTA study finds air contamination near fracking sites result of operational inefficiencies
August 29, 2016 10:39 AM - University of Texas at Arlington via EurekAlert!
Chemists at the University of Texas at Arlington have published a new study that indicates that highly variable contamination events registered in and around unconventional oil and gas developments are the result of operational inefficiencies and not inherent to the extraction process itself.
The study, published today as "Point source attribution of ambient contamination events near unconventional oil and gas development" in Science of the Total Environment, found highly variable levels of ambient BTEX, or benzene, toluene, ethyl benzene, and xylene compounds, in and around fracking gas drilling sites in the Eagle Ford shale region in South Texas. BTEX compounds in high concentrations can be carcinogenic and have harmful effects on the nervous system.
Blending wastewater may help California cope with drought
August 26, 2016 11:56 AM - University of California – Riverside via EurekAlert!
Recycled wastewater is increasingly touted as part of the solution to California's water woes, particularly for agricultural use, as the state's historic drought continues. The cost of treating wastewater to meet state health standards for reuse and to reduce salt levels that damage crops presents a new set of challenges, however.
Researchers at the University of California, Riverside have developed an economic model that demonstrates how flexible wastewater treatment processes which blend varying levels of treated effluent can be optimized to produce a water supply that is affordable, and meets and surpasses a variety of water quality requirements.