Friday, May 26, 2006
The Toxic-Free Legacy Coalition has just release its study of ten Washintonians for toxins.
Among the key findings are "[e]very person tested had at least 26 and as many as 39 toxic chemicals in his or her body.... For some chemicals, the levels we found are at or near those believed to be capable of causing serious problems, such as infertility and learning deficits.... "
To read the full report, see Pollution in People.
Update: Same thing goes for Canadians.
Tuesday, May 09, 2006
Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure. It is our light, not our darkness, that most frightens us. We ask ourselves, who am I to be brilliant, gorgeous, talented, fabulous? Actually, who are you not to be? You are a child of God; your playing small doesn't serve the world. There is nothing enlightened about shrinking so that other people won't feel insecure around you. We were born to make manifest the glory of God that is within us. It's not just in some of us; it's in everyone. And as we let our light shine, we unconsciously give other people permission to do the same. As we are liberated from our own fear, our presence automatically liberates others.
- Nelson Mandela
Friday, May 05, 2006
“Art” was traditionally used to encode information. A modern day Westerner transported back in time to a Polynesian ship might mistakenly think that the men are really jolly sorts because they are always singing. In fact, their “singing” is really pattern-encoded navigation data.
Long before western science ever figured it out, the Anasazi developed a spiral calendar that described the wobble in the Earth’s axis of 18.6 years, which is important for understanding flood-drought cycles. Having majored in physics, I can say unequivocally that the Anasazi system is far simpler. The Anasazi system could be learnt by almost anyone, but the Newtonian description of the same thing can only be understood by a tiny number of people.
Another example of art as information is the “song map” of the Pitjantjatjara women. Today the “Aboriginal art” that is produced mostly does not encode much meaningful information, if any. The traditional pictures, however, encoded geographical information. The pictures had accompanying songs that others could use to navigate with even if unfamiliar with the terrain. (Songs have a tempo that remains highly accurate over time. This can be used to time out travel distances, and the songs themselves can encode information about the surrounding environment.)
We can group together many physical patterns under one unified pattern referred to in permaculture as the “general model.” This model resembles a tree and can differentiate into waves, streamlines, spirals, cloud forms, toroids, branches, scatters and nets. When a two-dimensional representation of the model is tessellated, or put together to make a grid, it can reveal many other patterns.
Also revealed in the general model is the Overbeck jet – a pattern that is ubiquitous in nature.
Overbeck jet evident in an embryo and placenta:
If a flow is interrupted by an object in it’s path, alternating Overbeck jets appear creating a Von Karman trail. As a flag flaps in the wind, it is mapping out the Von Karman trail created by the flagpole.
Similar to Von Karman trails are Ekman spirals, which have a significant effect on weather. They occur when wind encounters an obstacle such as trees along an edge. The wind is thrust up but cannot oscillate to create Von Karman trails. Instead, spiralling waves are created. The upward flow of air can reach 20 to 40 times the height of the trees compressing the air. This can create rain bands under the right conditions.
Patterns in flow over time are regulated by “pulsers.” Pulsers control growth – prescribing when a function is to begin and end. The Belousov-Zhabotinsky reaction, which creates a non-linear chemical oscillator, is an example. In it, the Overbeck jet often occurs.
Pulses in the human body control heart beat, peristalsis, circadian rhythms, menstruation, etc. Pulses out of balance are evident in fibrillation, seizure, etc.
In a system, elements have their own order. Order defines relative size and placement of elements in a system. Our bodies’ organs demonstrate order. Consider the lungs. They start with trachea which branch into the primary bronchi to the secondary then tertiary bronchi to bronchioles to terminal bronchiole to respiratory bronchiole to alveolus. It is the same with the spleen, liver, kidneys, etc. Everything has its place in the order, and the system will function poorly with elements out of their order. Catchment dams are beneficial to the environment; large valley dams are destructive. In systems containing different orders, certain species will fit in a certain order; others will not. Rainbow Darters (Etheostoma caeruleum) do just fine in a fast stream – not so well in a pond. Landscape comes in orders. Headwaters have rough, rocky soils with shrubs and hardy vegetation. Estuaries have deep sand and sediment and have a richer variety of life.
Knowing flow effects like Von Karman trails, Ekman spirals and Overbeck jets not only inspire design ideas, they offer us a way to manipulate flow with minimal effort.
The following flowforms are used to oxygenate water:
Sphagnum moss could be used as a cheap, reusable filter for poor families with metal-contaminated water. I used a Scanning Electron Microscope and Energy Dispersion X-Ray spectrometer, to learn where Sphagnum stores the metals it absorbs. Is it possible to remove metals from Sphagnum cristatum after absorption? I tested this by placing Sphagnum in an acid solution after allowing it to absorb copper. To find out if Sphagnum could remove trace amounts of dissolved arsenic I prepared moss-filtered and control solutions for analysis in an Inductively Coupled Plasma-Mass Spectrometer. Finally, I applied it as a filter for contaminated water, using metal-rich water from my family’s well. I found that copper bound itself all over the surfaces of moss cells, and was easy to remove by soaking in a low pH solution. Sphagnum could be reused as a filter if it was dried between uses, and would remain effective. Sphagnum wasn’t very effective at removing arsenic, but it did remove other metals at low concentrations. Sphagnum is very cheap and transportable, and by showing that Sphagnum is reusable, it makes it even more cost effective; a single filter could last for years. For many places in the world, where people can’t afford the water filters they need, Sphagnum could save lives. Also, Sphagnum reusablility means people wouldn’t need to continually harvestit and harm the environment to obtain filters.Arielle, thanks for this great piece of research. I'm sure the permaculture community will put the information to good use.
Thursday, May 04, 2006
Something totally off the radar of the media, mainstream or otherwise, is the threat of erosion and salinisation. While erosion is more of a concern in tropical and arid regions, and salinisation on prairies and in arid regions, people in temperate areas are not immune to its effects. Erosion in some regions it is so great that a tonne of produce comes at a cost of 20 tonnes of topsoil.2 In Canada, 38% of farmland in the prairies has areas significantly affected by salinisation.3 This is a relationship that cannot continue. The food we eat needs healthy topsoil to grow. Animals and animal products we rely on graze on land. The plants the animals graze on need topsoil. We cannot rely forever on artificial fertilisers, which compound the problem as well as introduce many more.
Deforestation is a problem that is often missed and its implications are almost always missed. The easiest way to create a desert is to cut down trees. Condensation drip from trees can account for as much as 80 to 86% of precipitation on upland slopes of coastlines. That’s precipitation that never registers on any rain gauges. Moving a few hundred kilometres in from the coast, 100% of the precipitation may be coming from trees. How do we know this? Most of the evaporation off of the ocean is H2O16. At the coast, 40% of the water in rain is H2O16. Trees, however, transpire H2O18. A few hundred km in from the coast, the rain is 100% H2O18. Cut the trees and you risk making a desert.
Additionally, there is the very general problem of pollution. According to the Environmental Law Centre at the University of Victoria “Public health experts estimate that air pollution is responsible for 16,000 premature deaths in this country each year; at this rate, forty Canadians die from air pollution-related causes each and every day.” And according to the World Health Organization, there are no safe levels for human exposure to ground-level ozone.4 Small particulate matter has been liked to many illnesses including ischemic stroke and other cardiovascular diseases5 and lung cancer.6 Auto exhaust has been linked to childhood cancers.7 This is to say nothing of dioxins and furans.
Acid rain is still with us and there are no places on the Earth left that are immune to rain acidic enough to kill trees. There are an estimated 142,000 lakes in Canada that have been damaged by acid rain.8
The vital Antarctic krill population has plummeted by 80% since the 1970s.9 Krill are not only a source of food for much of the Arctic and Antarctic life, they are also an important carbon sink.10 One result of carbon emissions is that the ocean is acidifying and much of the ocean life cannot tolerate this rapid change in pH, particularly life that incorporates calcium carbonate to make shells. We are well on our way towards making the oceans more acidic than they have been in 65 million years.11
Levels of carbon dioxide have spiked since 2002 above the alarming rates of increase in the late 1990s.12 Also disturbing have been predictions of an ice-free arctic ocean within the next 100 years13; melting of Greenland at rates 2 to 3 times the rate in 1996 that could see sea level rise by 7m14, the melting of Antarctica which could see ocean levels rise much more than that; and the news that peat bogs in Siberia are thawing and have the potential to release billions of tonnes of methane.15 (Methane is 20 times more powerful a greenhouse gas than carbon dioxide.)
Modern industrial agriculture depends on petroleum. Without cheap energy, farmers aren’t able to grow – a problem currently seen in the United States.16 The future of fossil fuels looks rather grim. It seems as though we are very close to a peak in the global production of oil. Discovery of oil reserves has already peaked with the last huge discoveries made in the 1960s.
We won’t be switching to natural gas. It has already peaked in North America and overseas transport is a risky proposition not only for the chance of accident but from the standard 2% or so that regularly leaks out. The global climate has enough methane in it as it is. Coal won’t do it. The U.S. coal reserves are estimated to last about 40 years if consumption rates are increased to just 8%.17 Nuclear won’t do it. At current rates of usage, there are 50 years left of cheap uranium reserves left in the world.18 Increase the rates of nuclear power generation and the depletion rate increases. Furthermore, uranium is mined using oil-powered machinery.
This is most important because, as Dr. Albert Bartlett says, “Modern agriculture is the use of land to convert petroleum into food.” The United States uses 10.25 quadrillion Btu of total energy in the food industry, 2.20 quadrillion Btu of which go into agricultural production.19 This is a practice that cannot and will not continue. It is the textbook meaning of unsustainable.
Also of concern is the rush to distribute as many genetically modified organisms into the environment as possible. Perhaps the most alarming of these has been pseudomonas syringae. It’s thought that pseudomonas syringae could play a role in up to 80% of the world’s rain formation. The genetically modified version is incapable of serving as a condensation point for rain droplets and is currently used to spray fruit crops to protect them from frost. So, we get to protect monoculture farmers and threaten life on the planet at the same time.
Ultimately, the bad news is that homo sapiens have reached a point where they are the single most influential species on the planet and that influence exerted is mostly negative. Don’t panic. This need not be the case. We have the practical knowledge to exert our influence an environment-enhancing way. Instead of wiping out species, we could be contributing to speciation. Instead of creating deserts, we could be reversing them and creating forests in their place. If you kick nature, nature kicks back harder. If you benefit nature with good design, you almost always get back more benefit than you designed for.
18. http://www.world-nuclear.org/info/inf75.htm Nuclear power also leaves a toxic legacy for millenia.
Tuesday, May 02, 2006
Where: 16 Thomas Street, Clayton, Southeast Melbourne
When: Sunday May 7, 12 noon – 5pm
Entry: with (optional) donation.
Phone: 03 9029 2550
There will be:
- Garden tours
- Food stalls (including special treats from South America)
- An auction of wonderful wares and odd items
- Live music and poetry (if it's trumpet-playing, you are in for a treat)
- Documentary screenings
- Talk on “The Living Soil: Making the Invisible Visible”
- Plants, seeds, and garden goodies for sale (donations of goods welcome)
- PermaSalsa – where permaculture gardening meets salsa dancing!
Monday, May 01, 2006
"There is one, and only one, solution, and we have almost no time to try it. We must turn all our resources to repairing the natural world, and train all our young people to help. They want to; we need to give them this last chance to create forests, soils, clean waters, clean energies, secure communities, stable regions, and to know how to do it from hands-on experience
- Bill Mollison