The Global Fool

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Quality Water, Quality Life: Aquatic Health and Contaminants in the Midcoast Oregon Salmon Watersheds
Jun08

Quality Water, Quality Life: Aquatic Health and Contaminants in the Midcoast Oregon Salmon Watersheds

A guest post by Ray Kinney From ridge tops to reefs, environmental degradation has caused many salmon populations to decline to one to ten percent of former numbers. Young salmon survival in freshwater is only 2 to 5% from egg to smolt phase just before entering the ocean phase of their life cycle. Many causative effects for this decline are known, but many remain to be clarified. Politics often prevents adequate investigation of contaminant effects for water quality. Chronic low dose accumulative effects of toxic contaminants take a toll that is generally unrecognized by fisheries managers. Our benevolent rainfall flows down out of the Coast Range to become, once again, part of the sea and the productivity of the salmon cycle of the near-shore ocean. Nutrients from the ocean, in the form of salmon and lamprey spawner carcasses, had fertilized our forests, streams, and rivers like an incoming tide for thousands of years. Our forest garden grew rich because of this tide of nutrients. Reduced numbers means reduced nutrients, which reduces development, growth, and survival abilities of the fish. The land also nourishes the sea. Freshwater flows down out of the mountains, past our farms and towns, through the jetties, and out over the continental shelf. These nutrient tides over land and sea have been shaping salmon for thousands of years, providing diversity, fitness, and resilience to the young fish and other stream organisms that support the salmon cycle complexity. For many hundreds of years humans have increasingly affected the quality of this complexity in ways that have stressed the fish. In the last two hundred years we have greatly increased pollution. Fish harvest levels increased unsustainably, while beaver and timber harvests altered the landscape stressing the salmon cycle. Increasing pollutants have contaminated the flow to the sea. Copious leaching rainfall and snowmelt dissolve and transport nutrients and contaminants down the river out of the Coast Range. Calcium and iron ride the waters downstream and out over the shelf during the winter, enriching the sea floor mud. As upwelling conditions increase in the summer, much of this iron distributes northward with the currents and combines with nitrates to fertilize plankton blooms that feed the food chain for the salmon. Iron and nitrate are in shorter supply over much of the ocean and limit productivity in many parts of the ocean. Here, off of the Oregon coast, the iron leached from our soils provides an important key to salmon ocean productivity. Large quantities of nitrate ride downstream through the freshwater, from red alder tree vegetation cover concentrations in our timberland. The red alder ‘fix’ nitrogen out of the air providing fertilizer...

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Global Threats: Children’s Exposure to Toxic Pesticides
May17

Global Threats: Children’s Exposure to Toxic Pesticides

By Roberta Attanasio In 2012, the American Academy of Pediatrics (AAP) released a policy statement to outline the harmful effects of pesticides in children, and to make recommendations on how to reduce exposure. According to the statement, prenatal and early childhood exposure to pesticides is associated with pediatric cancers, decreased cognitive function, and behavioral problems. In addition, the statement pointed out that recognizing and reducing children’s exposure to pesticides requires improved medical training, public health tracking, and regulatory approaches, and made recommendations on specific actions that should be taken to decrease such exposure. Despite the recognition of the dangers associated with pesticide use, and the AAP recommendations on limiting children’s exposure, not much has been done since 2012 — indeed, it’s likely going to get worse before it gets better. The AAP recommended that pediatricians should ask parents about pesticide use around the home and yard, offer guidance about safe storage, and recommend parents choose lowest-harm approaches when considering pest control. Are pediatricians following these recommendations? At this time, let’s say this is an open-ended question — although we may guess what the correct answer is. Let’s now move from the local (the American Academy of Pediatrics – AAP) to the global (the Food and Agricultural Organization of the United Nations – FAO). According to the International Labour Organization (ILO), nearly 100 million boys and girls between 5 and 17 years old are engaged in child labor in agriculture. Many are directly exposed to toxic chemicals while working on the farm — however, children are also exposed when they help with family chores or play, and through the food they eat and the water they drink. Exposure can result in acute poisoning and sickness immediately after contact. But often, it also has longer-term, chronic impacts on their health and development. Children are particularly vulnerable to pesticide exposure for various biological and behavioral reasons. They breathe in more air than adults and so take in more dust, toxic vapors, and droplets of spray. Relative to their body weight, children need to eat and drink more than adults, and if food is contaminated, they absorb more toxins. The surface area of a child’s skin per unit of body mass is greater than that of an adult, and their skin is more delicate. All these factors can lead to greater absorption of chemicals, and children’s organs are less able to detoxify pesticides because they are not yet fully developed. Now, recognizing that education is crucial to limit exposure to pesticides (as stated by the AAP in 2012), FAO and ILO extension workers in Africa and elsewhere are engaging with rural communities to reduce...

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Dante’s Fainting: A Medical Enigma from the Middle Ages
May15

Dante’s Fainting: A Medical Enigma from the Middle Ages

A guest post by Michele A. Riva 2015 is the 750th anniversary of the birth of the Italian poet Dante Alighieri (1265-1321), the author of the literature masterpiece the Divine Comedy. Written between 1304 and 1321, the Divine Comedy is an epic poem that describes Dante’s imaginative and allegorical journey through Hell, Purgatory, and Heaven. The poem has inspired not only the creative efforts of illustrious authors such as William Shakespeare, Geoffrey Chaucer and John Milton, but also an ongoing debate on the “medical conditions” that are so frequently depicted in it. During his Hell-Purgatory-Heaven journey, Dante frequently experiences symptoms such as loss of consciousness, hallucinations and fainting, which he relates to love and passion, fear and anguish, and mysticism. However, a few medical scholars think these symptoms could be mirroring a real pathological condition that affected Dante since childhood. So, for these medical scholars, the question is: what is the most likely pathological condition that was causing Dante’s symptoms? Narcolepsy is one of the possible answers. Narcolepsy is a disorder characterized by excessive sleepiness, associated with hallucinations, episodes of muscle weakness and subsequent falls, which are always triggered by strong emotions. So, all the Divine Comedy could be interpreted as a result of hallucinations in a subject afflicted by a sleep disorder. Emotional syncope might also explain Dante’s loss of consciousness. This condition, one of the most common causes of fainting, causes a sudden drop in heart rate and blood pressure. It occurs in response to triggers such as scary, embarrassing or uncomfortable situations, as well as instances of high stress or trauma, similar to those that Dante experiences during his journey. Finally, another possible, and even more intriguing explanation of Dante’s fainting is related to food/drink depletion. According to the poet, his journey in Hell starts on the night of April 8, 1300, and ends in Paradise one week later, on April 15. During the whole passage through Hell, which lasts about 48 hours, he keeps walking, and he neither eats, nor drinks. Ditto for his journey through Purgatory. Thus, for five days, he goes with no water, and no food — at the same time, he is experiencing heavy emotional distress. After his last collapse in Purgatory, his guide Beatrice throws him into the Lethe river — Dante drinks for the first time in his long journey. He does not faint anymore. But, what about the high temperatures he has to endure while walking in Hell? This is certainly another factor that might have contributed to his distress and caused the multiple syncopes he experiences there. We’re attempting to diagnose potential disorders that affected Dante’s health....

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Circular Economy: Turning Waste into Resources
May09

Circular Economy: Turning Waste into Resources

By Roberta Attanasio We take, we make, we dispose — in this daily process, we deplete irreplaceable natural resources and generate not only massive waste, but also extensive environmental and health hazards. Our current economy — or linear economy — is based on the take-make-dispose approach. However, this approach is not sustainable. We need to ask ourselves a crucial question: how can we generate clean prosperity today, while preserving resources and ecological functions for use by future generations? In other words, how can we build a sustainable economy? The answer is: we can do so by adopting a new approach, one based on the so-called circular economy. According to the Ellen MacArthur Foundation, a circular economy is one that is restorative by design, and which aims to keep products, components and materials at their highest utility and value at all times, distinguishing between technical and biological cycles. In the circular economy, materials and products are reused, repaired, refurbished and recycled. Waste can be turned into resources. The inspiration for the circular economy approach is nature. Waste does not exist in nature, because ecosystems reuse everything that grows in a never-ending cycle of efficiency and purpose. Thus, the circular economy approach is based on an economic system in which no materials are wasted. In such a model, “Instead of selling products, we should retain ownership and sell their use as a service, allowing us to optimize the use of resources. Once we sell the benefits of the products instead of the products themselves, we begin to design for longevity, multiple reuse, and eventual recycling. This requires a new generation of materials as well as innovative development and production processes. In addition, we need to define new business models and redefine the concept of legal ownership and use, public tendering rules, and financing strategies. And we need adaptive logistics and a leadership culture that embraces and rewards the circular economy.” The video below, by the European Commission, is a fascinating tour of different creative approaches that are now being used to move towards a circular economy....

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Neonicotinoid Pesticides: Bad for Bees, Bad for Many Other Species
May06

Neonicotinoid Pesticides: Bad for Bees, Bad for Many Other Species

By Roberta Attanasio Do neonicotinoid pesticides harm bees? According to scientific evidence, the answer is “yes”. Indeed, scientific evidence for the toxic effects of neonicotinoid pesticides on bees is accumulating at an increasing pace. And, on the basis of scientific evidence, the European Commission banned in 2013 the use of three neonicotinoids — clothianidin, imidacloprid and thiamethoxam — on flowering plants. The ban was motivated by findings from the European Food Safety Authority (EFSA); these findings were based on the evaluation of the scientific studies available at the time. Now, a report from the European Academies Science Advisory Council (EASAC) emphasizes that bees are not the only species affected by the use of these pesticides. The report is based on the findings of an international group of independent scientists with expertise ranging from pollination biology through systems ecology to toxicology. According to the report, there is more and more scientific evidence that widespread use of neonicotinoids has severe effects on species that are important for pollination, natural pest control, and soil productivity. For example, predatory insects such as parasitic wasps and ladybugs that aid in pest control, and earthworms that improve soil productivity, are all harmed. In addition, neonicotinoid use has a negative impact on biodiversity. Neonicotinoids are neurotoxic (poisonous to nerves or nervous tissue of insects and other organisms), and act systemically in the plants — their solubility in water allows them to be absorbed and spread via the plant’s vascular system to all of its tissues. They reach leaves, flowers, roots and stems, even pollen and nectar, and become toxic not only to sap-sucking pests such as aphids or mealybugs, but also to any other species that harvest the different parts of the plant. In addition, exposure is possible across trophic levels, as for example in the case of bees foraging on honey dew, predators exposed through ingesting prey, or soil organisms decomposing contaminated organic matter. There is also evidence for sub-lethal effects of very low levels of neonicotinoids, over extended periods of time, on non-target beneficial organisms. Repeated sub-lethal doses may eventually become deadly once a certain threshold is passed. The EASAC report acknowledges that use of all pesticides is based on the balance between the desired effect on food production and the inevitable risk of collateral damage to non-target species and the environment. However, for neonicotinoids, scientific evidence accumulated over the last two years suggests that, rather than balance, there in imbalance —  the risk of collateral damage is too high when compared to the benefits. Peter Neumann, EASAC’s Chair of the Working Group, wrote in an article published in the journal Nature that the...

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