Obesity rates in Korea are among the lowest in the OECD, but have been increasing steadily. About 4% of the adult population is obese in Korea, and about 30% are overweight (including obese). OECD projections indicate that overweight rates will increase by a further 5% within ten years.
Author: mixim
model of compost piles
A two dimensional, reaction-diffusion model of compost piles
Thiansiri Luangwilai, Harvinder Sidhu, Mark Nelson
Abstract
We consider the self heating process in a two dimensional spatially dependent model of a compost pile which incorporates terms that account for self heating due to both biological and oxidation mechanisms. As moisture is a crucial factor in both the degradation process and spontaneous ignition within a compost pile, this model consists of four mass-balance equations, namely, energy, oxygen, vapour and liquid water concentrations. Analyses are undertaken for different initial water contents within the compost pile. We show that when the water content is too low, the reaction is almost negligible; whereas when it is too high, the reaction commences only when the water content evaporates and the water ratio drops to within an appropriate range. However, for an intermediate water content range, the biological reaction is at its optimum and there is a possibility of spontaneous ignition within the compost pile. Continue reading “model of compost piles”
The smoky flavor
When an estimated 60 million Americans fire up their barbecue grills this Fourth of July, they’ll be burning the equivalent of 2,300 acres of forest and consuming enough energy to meet the residential demand of a town the size of Flagstaff, Ariz., for an entire year.
Tristram West of the Department of Energy’s Oak Ridge National Laboratory also calculated that the grills would emit nearly 225,000 metric tons of carbon dioxide. A metric ton is equal to about 2,200 pounds. West’s estimate includes carbon dioxide emissions from production and combustion of the fuel. Carbon dioxide, considered a greenhouse gas, is increasing in the atmosphere each year and is thought to be a major factor in climate change.
July 4 is by far the most popular day of the year for cookouts, according to a Hearth, Patio & Barbecue Association (http://www.hpba.org/index.cfm) survey that found that 76 percent of the nation’s grill owners use at least one of their grills that day. The survey also found that 76 percent of American households own a grill and 42 percent own more than one. Sixty-one percent own a liquefied petroleum gas grill; 48 percent own a charcoal grill; 9 percent own a natural gas grill; and 7 percent own an electric grill.
West, a researcher in ORNL’s Environmental Sciences Division, assumed a 35,000 British thermal unit per hour output for the average grill and one hour of operation for each grill. In making his calculations, West took into account the carbon content and carbon dioxide emissions for each type of fuel.
“While more grills are fueled with liquefied petroleum gas, the majority of carbon dioxide emissions are from grills using charcoal briquettes, because the amount of carbon per Btu of gas is about one-third that of charcoal,” West said.
Although electric grills emit no on-site carbon dioxide, West said they have the highest emissions per hour of all the grills when accounting for fossil fuel emissions from producing and transmitting electricity. A liquefied petroleum gas grill operated for an hour would emit 5.6 pounds of carbon dioxide while a charcoal grill would emit about 11 pounds. An electric grill would account for about 15 pounds of carbon dioxide.
The smoky flavor and the char that one gets from a well-grilled steak is not particularly good . (http://www.bonappetit.com/test-kitchen/cooking-tips/article/is-grilling-good-for-you-or-bad-here-s-what-science-says ). When fat from the cooking meat drips down on the hot coals, the smoke that forms contains stuff called polycyclic aromatic hydrocarbons (PAH)( http://www.cancer.gov/cancertopics/factsheet/Risk/cooked-meats ). And the charred exterior of the meat (or inside, if you like things extremely well-done) is chock full of something called heterocyclic amines (HCA). Exposure to high levels of HCAs and PAHs can cause cancer in animals; however, whether such exposure causes cancer in humans is unclear.
Currently, no Federal guidelines address consumption levels of HCAs and PAHs formed in meat.
HCA and PAH formation can be reduced by avoiding direct exposure of meat to an open flame or a hot metal surface, reducing the cooking time, and using a microwave oven to partially cook meat before exposing it to high temperatures.
Ongoing studies are investigating the associations between meat intake, meat cooking methods, and cancer risk.
Both of these have been linked in studies, like one conducted by the National Cancer Institute in 1999, to higher rates of colorectal cancers, and both chemicals have been added to the DOH’s official list of carcinogens (PAH all the way back in 1981, HCA in 2005). In 2009, another study found that people who preferred their steaks “very well done” were 60 percent more likely to get pancreatic cancer than those who liked them bloody (or didn’t eat steak at all), and both compounds have been found to cause tumors in mice (and might cause even more tumors in humans, since mice process the chemicals differently).
Nearly half of all seafood consumed globally comes from aquaculture
Nearly half of all seafood consumed globally comes from aquaculture, a method of food production that has expanded rapidly in recent years. Increasing seafood consumption has been proposed as part of a strategy to combat the current non-communicable disease (NCD) pandemic, but public health, environmental, social, and production challenges related to certain types of aquaculture production must be addressed. Resolving these complicated human health and ecologic trade-offs requires systems thinking and collaboration across many fields; the One Health concept is an integrative approach that brings veterinary and human health experts together to combat zoonotic disease. We propose applying and expanding the One Health approach to facilitate collaboration among stakeholders focused on increasing consumption of seafood and expanding aquaculture production, using methods that minimize risks to public health, animal health, and ecology. This expanded application of One Health may also have relevance to other complex systems with similar trade-offs.
Access to nutritious foods of animal origin, including aquatic animals, was crucial in the evolution of hominids and early human brain development [1•]. Aquatic animals contain essential nutrients, such as iodine and omega-3 long-chain polyunsaturated fatty acids (LCPUFAs), that are generally limited in other animal foods. While, historically, consumption of seafood has been important for humans, overfishing and other factors (e.g., population growth, pollution, ocean acidification) have greatly decreased wild fish stocks and damaged marine resources [2•]. In response to declining marine resources and an increasing demand for seafood, aquaculture has grown dramatically in the past four decades. In 2011, aquaculture accounted for nearly half of all seafood consumed by humans [3], and global aquaculture production continues to increase at a rate of 6 % per year [4].
Cardiovascular disease (CVD) remains the leading cause of death
10 July 2014
Cardiovascular disease (CVD) remains the leading cause of death
among Europeans and around the world. The Global Burden of
Disease study estimated that 29.6% of all deaths worldwide
(15 616.1 million deaths) were caused by CVD in 2010, more than
all communicable, maternal, neonatal and nutritional disorders combined,
and double the number of deaths caused by cancers.1 This
paper provides an update for 2014 on the burden of CVD, and in particular
coronary heart disease (CHD) and stroke, across the countries
of Europe. This overview updates the work published in this
journal in 20132 and provides an up-to-date synopsis of the key
data in relation to mortality and morbidity from CVD across Europe.
obesity paradox
Fitness and fatness: not all obese people have the same prognosis
Second study sheds light on the ‘obesity paradox’
Topics: Cardiovascular Disease Prevention – Risk Assessment and Management
Date: 05 Sep 2012
People can be obese but metabolically healthy and fit, with no greater risk of developing or dying from cardiovascular disease or cancer than normal weight people, according to the largest study ever to have investigated this, which is published online today (Wednesday) in the European Heart Journal [1].
The findings show there is a subset of obese people who are metabolically healthy – they don’t suffer from conditions such as insulin resistance, diabetes and high cholesterol or blood pressure – and who have a higher level of fitness, as measured by how well the heart and lungs perform, than other obese people. Being obese does not seem to have a detrimental effect on their health, and doctors should bear this in mind when considering what, if any, interventions are required, say the researchers.
The State of Corporate Concentration
Submitted on 04 September 2013
Communiqué number:
111
ETC Group has been monitoring the power and global reach of agro-industrial corporations for several decades – including the increasingly consolidated control of agricultural inputs for the industrial food chain: proprietary seeds and livestock genetics, chemical pesticides and fertilizers and animal pharmaceuticals. Collectively, these inputs are the chemical and biological engines that drive industrial agriculture.
In this Communiqué, ETC Group identifies the major corporate players that control industrial farm inputs. Together with our companion poster, Who will feed us? The industrial food chain or the peasant food web?, ETC Group aims to de-construct the myths surrounding the effectiveness of the industrial food system.
In addition to data on private sector plant breeding and the commercial seed and agrochemical industries, the report includes market data for the fertilizer and animal pharmaceutical industries, as well as the highly concentrated livestock genetics industry and the fast-growing aquaculture industry.
Download the pdf to read the 40-page report.
| Attachment | Size |
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 CartelBeforeHorse11Sep2013.pdf |
2.03 MB |
UCS dietary recommendations
the Union of Concerned Scientists (UCS) shows that finding innovative ways to help Americans increase their consumption of fruits and vegetables would greatly benefit our health and our national economy.
More than 127,000 deaths per year from cardiovascular diseases could be prevented, and $17 billion in annual national medical costs could be saved, if Americans increased their consumption of fruits and vegetables
to meet dietary recommendations.
Sustainable Diets
Understanding Sustainable Diets: A Descriptive Analysis of the Determinants and Processes That Influence Diets and Their Impact on Health, Food Security, and Environmental Sustainability1,2,3
The confluence of population, economic development, and environmental pressures resulting from increased globalization and industrialization reveal an increasingly resource-constrained world in which predictions point to the need to do more with less and in a “better” way. The concept of sustainable diets presents an opportunity to successfully advance commitments to sustainable development and the elimination of poverty, food and nutrition insecurity, and poor health outcomes. This study examines the determinants of sustainable diets, offers a descriptive analysis of these areas, and presents a causal model and framework from which to build. The major determinants of sustainable diets fall into 5 categories: 1) agriculture, 2) health, 3) sociocultural, 4) environmental, and 5) socioeconomic. When factors or processes are changed in 1 determinant category, such changes affect other determinant categories and, in turn, the level of “sustainability” of a diet. The complex web of determinants of sustainable diets makes it challenging for policymakers to understand the benefits and considerations for promoting, processing, and consuming such diets. To advance this work, better measurements and indicators must be developed to assess the impact of the various determinants on the sustainability of a diet and the tradeoffs associated with any recommendations aimed at increasing the sustainability of our food system.
The Chicago Council8 found in its study, Bringing Agriculture to the Table, that diet-related noncommunicable diseases are on track to rise by 15% by 2020 if current trends in the global commercialization of processed foods continue to be overconsumed by an increasingly less active global population (1). Currently, the global food system is estimated to contribute to 30% of global greenhouse gas emissions (GHGEs). With the global population expected to rise to 9 billion or more people by 2050, the Foresight Project9 found that rising demand to transport, store, and consume the most resource-intensive food types (namely dairy and meat) in developing economies will further increase the contributions of food and agriculture to environmental degradation and climate change (4). At the same time, the Livewell Project10 found that UK diets could in fact be rebalanced in line with the government’s dietary guidelines (the Eatwell Plate) to achieve GHGE targets for 2020 by substantially reducing meat and dairy consumption (19). However, looking to GHGE targets for 2050, researchers noted that changes would be needed in both food production and consumption to reach these longer-term targets (7). Recent analysis of the new Nordic Diet found that improvements in GHGEs and other environmental wins could be achieved by improving production, reducing transportation, and changing food types (20). Similar recommendations followed an analysis of dietary shifts in France (21).
Permaculture
Permaculture is a branch of ecological design, ecological engineering, environmental design, construction and integrated water resources management that develops sustainable architecture, regenerative and self-maintained habitat and agricultural systems modeled from natural ecosystems.[1][2] The term permaculture (as a systematic method) was first coined by Australians Bill Mollisonand David Holmgren in 1978. The word permaculture originally referred to “permanent agriculture” [3] but was expanded to stand also for “permanent culture,” as it was seen that social aspects were integral to a truly sustainable system as inspired by Masanobu Fukuoka‘s natural farming philosophy.
Permaculture is a philosophy of working with, rather than against nature; of protracted and thoughtful observation rather than protracted and thoughtless labor; and of looking at plants and animals in all their functions, rather than treating any area as a single product system.
—Bill Mollison, [4]
Mollison developed permaculture after spending decades in the rainforests and deserts of Australia studying ecosystems. He observed that plants naturally group themselves in mutually beneficial communities. He used this idea to develop a different approach to agriculture and community design, one that seeks to place the right elements together so they sustain and support each other.
Today his ideas have spread and taken root in almost every country on the globe. Permaculture is now being practiced in the rainforests of South America, in the Kalahari desert, in the arctic north of Scandinavia, and in communities all over North America. In New Mexico, for example, farmers have used permaculture to transform hard-packed dirt lots into lush gardens and tree orchards without using any heavy machinery. In Davis, California, one community uses bath and laundry water to flush toilets and irrigate gardens. In Toronto, a team of architects has created a design for an urban infill house that doesn’t tap into city water or sewage infrastructure and that costs only a few hundred dollars a year to operate.
Bill Mollison Permaculture Lecture Series, On-Line
Note: NetWorks Productions Inc. holds the copyrights to this on-line series. We ask that our copyrights be honored. In addition, “Permaculture” is a copyrighted word. Only those who have completed a 72-hour design course are authorized to use the word in commerce.
Who is Bill Mollison?
These videos are documents from two design courses taught by Bill Mollison at the Fossil Rim Wildlife Center in Glen Rose Texas in 1994 and 1995. They are a definitive selection from our original 16 part series. These tapes bear many viewings and will benefit anyone who wants to learn how to help regenerate the earth – from back yard to bio-region. Teachers of permaculture have found these tapes to be a valuable coaching tool – edited to one hour.