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Showing posts with label Sustainability. Show all posts
Showing posts with label Sustainability. Show all posts

DIY Solar Bag

Solar Bag recharges anything that can connect to a USB port. Solar energy is collected and stored in the battery pack while not in use. I use it to keep my power hungry cell phone and ipod running all day or in an emergency. You can buy these online for a few hundred bucks, but this one cost about $100 if you DIY.


The solar bag consists of a flexible solar panel, rechargeable Ni-MH batteries, and a few electronic components to tie it together.

The solar panel is a PowerFilm P7.5-150 producing 7.2V and 200ma in ideal conditions, more than enough to charge three nickel cadmium batteries.

Two circuits are used in this design. The first circuit employs a MAX639 step-down switching regulator to transfer all of the solar panels energy to the batteries as efficiently as possible. The second circuit uses a LT1302
Micropower High Output Current Step-Up DC/DC Converter to provide the necessary USB 2.0 power requirements. Both of these integrated chips are free from the manufacturer when you sign up on their websites.

All of the circuitry can be placed on a project board and fits into a small space. I found some garden solar lights on liquidation at Wallmart and it was easy to remove the existing circuit and incorporate my board into the design which evidently gave me a second solar panel which I can take out and place in a window when I'm indoors. With a full day of sunlight, enough energy is stored in the batteries to completely recharge my power hungry cell phone and ipod and I feel good about using renewable energy whenever I can.

Green Building Guidelines and Initiatives - A Canadian Perspective

Gone are the days used up in favour of a disposable society, leaving what remains to provide for an explosion of civilization and that which they covet. Other complex cultures have perished throughout time from degradation to ecosystems and an inability to engineer a peaceful coexistence. So it is no wonder that today’s green/sustainable building practices have developed beyond concept into doctrine, finding their way into our hearts and politics. And while concerns about environmental degradation, resource shortages, and human health impacts are promoting widespread acceptance of green building practices, more can be done to aid the day-to-day practitioners in mitigating the enormous pressures on planetary ecosystems caused by human activities.

Towards these endeavours, the concept of resource conscious design, which ultimately aims to minimize natural resource consumption and impact on ecological systems, is presented in a familiar context. In particular, Canadian guidelines and initiatives are put forth as examples of current green building applications and their environmental benefits.

Footprint Analysis: A Measure of Lifestyle

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According to a recent publication from the World Wildlife Federation, if a “business as usual” approach continues to dominate the mentality of prosperous nations, society as a whole may find it increasingly difficult to affect meaningful change other than responding to unanticipated environmental calamities brought about as a consequence. Even more alarming, experts believe by 2050 accumulated ecological damage may be irreversible unless we manage to alter our self-destructive course in time. [b]

The Risks of Lithium Technology (Part 2)

In Part 1 we examined the history and engineering behind Lithium battery technology and drew comparisons between alternative technologies in use today. In part 2 we will explore the impacts of Lithium technology on society.

Economics at the Wheel

All too often, social hardship triggers technological innovation.  So, it’s no wonder that despite the current global economic turn down, many remain optimistic of emerging lithium ion technology as a fitting surrogate to wean us from our oil dependency and usher in an era of sustainability. Since being introduced to the market in the early 1990s, production of lithium ion batteries has increased 4-5% per year resulting in a 6 billion dollar market as of 2008 [305].  At the same time, the conventional lead acid battery market, driven primarily by the automotive sector, is estimated to be a staggering 40 billion dollar industry by comparison, of which lithium is poised to replace.

The Risks of Lithium-Ion Technology (Part 1)

lithium_ion_batteries_2 No one can argue the impact battery technology has had on society; ushering in an era or portability and mobility like never before, all the while helping to spark a green revolution, and empower people with tools and ideas for a sustainable future. What’s more, emerging lithium ion technology provides significantly faster charge, longer life, and designers in the U.S. have managed to configure large lithium ion batteries for mass production and ensure they are long-lasting and safe for the auto industry.

Risks seemingly mitigated, recent incentives and regulation will surely mean a boon for lithium technology, however, social, environmental, and political debates rage on between the Middle East, South America and the United States over control of lithium and oil resources.  Furthermore, a growing global dependency on oil, coupled with the countless trillions oil producers stand to lose should lithium ion replace oil only serve to create new geopolitical tensions and promote false claims, rather than help abate existing ones.

In the course of two articles, we will discuss these issues as they pertain to emerging Lithium-Ion technologies, examine the history and engineering behind such inventions, and draw comparisons between alternative battery technologies in use today. These papers will explore the functionality of lithium batteries and investigate the pros and cons of different technologies as they relate, and aim to shed light on the associated social and environmental risks.

5 L.E.D. Projects Sure To Enlighten

As a Canadian I’m reluctant to admit we use more energy per capita than any other nation in the world and although we have plenty of cheap, renewable electricity, it’s wasteful, both in cost to the environment and the family’s budget. It’s true we’ve been making the switch to compact fluorescent (CFLs) from incandescent bulbs, but they still cost more than standard bulbs and contain mercury which is an environmental concern if not disposed off properly.

Light Emitting Diode (LED) technology, however, uses a fraction of energy compared to conventional incandescent or even CFLs. They last up to 50,000 hours, compared to 6,000 for a CFL or 1,000 for standard incandescent bulbs. LEDs convert more electricity into light, with very little waste heat produced, making them the most efficient lighting technology available on the market. Here are five eco friendly ideas with step-by-step instructions that shine a light on LED technology.

Beat the Summer Gas Crunch - Hypermiling Techniques

If done properly, the average driver can beat the Transport Canada Combined Fuel Consumption Rating (CFCR) of his or her vehicle by 40-50% this summer by applying a few simple hypermilling techniques.

Tire pressure
You’ve heard this one before. Higher tire pressure means lower rolling resistance, better fuel economy, and longer life. Installers will usually under inflate tires for a more comfortable ride, but it is practical to inflate tires closer to the maximum rating found on the sidewalls. Service your tires regularly and ask your mechanic to use nitrogen instead of air. Nitrogen is lighter than air, leaks less than air, prohibits rust, and has added safety and mechanical benefits making it a smart alternative. Nitrogen is available at Canadian Tire and is free at Cosco service centers in Canada.

Tuned engine and mechanical parts
A poorly tuned engine can result in a 40% decline in fuel economy and can produce significantly more emissions than allowed by law. Reducing friction and vibration can be the most important aspect of your fuel economy. Have unusual noises checked out. A well oiled machine runs efficiently and if left un-serviced, builds up friction forces reducing efficiency. Use synthetic oil when possible to reduce engine wear and pollution. Maintain the engine’s air filters regularly by shaking or vacuuming out particles.

Trim the fat
Carrying unnecessary loads around adds up. Reducing your load by 100lbs can reduce your fuel costs by 2%. Clean out the trunk, remove roof racks, and any other items not being used. Consider keeping the fuel tank half full and if you’re the only person driving your car think about removing back seats, plastic covers, and whatever else you don’t actually need as a next step.

Accelerate slowly
Tests by Edmonds.com show accelerating from 0 to 60 in 20 seconds from stoplights and stop signs can cut fuel consumption by around 37% for SUVs. You won’t win any drag races, but that’s plenty of time to enter freeways and highways without incident.

Practice smart braking
More energy is required to get your car moving from a dead stop than to sustain motion so a big challenge for hyper-milers is learning how to avoid stops. Let off the gas ahead of stops and let your car role in neutral, only applying the brakes as needed. At red lights, leave the car in neutral (if it has an automatic transmission). At stop signs, try not to come to a dead stop, but let the car creep along, until it’s safe to continue.

Follow the leader
The reason is aerodynamic: a flow of traffic generates a localized wind current in the direction of travel. You will benefit from this artificial breeze. Drive at a steady pace and don’t tailgate.

Cruise control
Contrary to popular belief, cruise control is less efficient than constant throttle/load driving techniques where you manually tweak the accelerator. Set the cruise control if your speed creeps up on long trips or you have difficulty holding a constant speed.

Don't idle unnecessarily
If you’re stopped for more than 7-seconds, turn the engine off. Today’s fuel injection systems are efficient, typically using about 5 seconds of fuel to start the engine. You may not make friends with the guy behind you at the drive-through, but try not re-starting the engine until you absolutely have to.

Air conditioning
The air conditioner increases fuel consumption by more than 20%. Consider rolling the windows down or using solar powered air vents. If you have to use the air conditioner, set the vehicle’s air flow to recirculation, switch it on when under light engine loads or deceleration, and off when under moderate or heavy loads.

Hold the inside lane
Holding the inside lane around long curved sections of freeway can make a difference over the long haul. By taking the shortest route around curves you will shave about 1% off the travel distance on a three lane highway each time, which adds up over the life of your vehicle.

And then there are always the old fashioned ways to save money on gas like carpooling and using public transit. Don’t forget those either!

Technology Without Risk

As the wheels of technology churn out exponentially complex systems designed to lightened man’s burden and propel society upwards and onwards, in turn much of society has little or no bearing on which direction we are heading or how far we may fall. We leap without looking, and while escaping the naiveté of our technological childhood, we have more recently become aware that the complexity and pace of the derived technology has resulted in an increasing frequency and severity of catastrophic disasters.

Consequently, while risk acceptance remains a social decision [1 45], the science of risk management which takes into account the actual risks and the general public’s negative perceptions of the risk stemming from a lack of faith in the political systems set up to fill the gap, whether they be technological or human, are diverging. This isn’t to say that technology and society cannot coexist without risk. It is this author’s and others belief that risks can be mitigated to acceptable levels, but the social perception of said risks must also be understood by all of the players for a proper assessment to be formulated and meaningful progress to take place.

The Technological Blind Spot

Can Progress Exist Without Technology
While most would argue progress cannot exist without technology and point towards obvious anecdotes such as longer life expectancy, higher standard of living, and greater freedom to endeavor, all due in large part to the industrial revolution[1 34], it would be without regard for the innumerable human and environmental suffering sustained. The original aspirations society holds for technology at its roots; to free man from himself and nature, does it justice for a time as is evident by the advancements in medicine, information, and the freedoms afforded to pursue personal goals of Western society; the forebears of technological revolution. What is fundamentally different in the West today, however, is that these lofty goals have been supplanted with a hegemonic notion of technocracy as the self perpetuating means to progress [1 37]. Moreover, the complexity and breath of technology as Karl Marx observed [2], creates an inability to comprehend, let alone act upon the technology, resulting in what Heidegger more recently called the “technological blind spot” [3 21] which limits a society’s ability to fully understand the risks and benefits of the science at hand.

One simply has to ask similar questions our enlightened forefathers did to remedy this short sightedness. In the modern context, the question of longevity for example: If society relied less on the trappings of the modern world, instead sought holistic and spiritual anecdotes, or held a higher regard for natural systems, could we live just as long and be healthier? Perhaps a cleaner way of life, free from the stresses of a modern world holds the key to our health, happiness, and our progress. Nonetheless, it is big carrot to avoid when the medical community makes claims that we are decades away from cheating death altogether.

Similar questions, although not new [1 40], are once again becoming the focus of social debate, which call into question the impact of technology on society and the progress it more frequently suffers from. Perhaps a step back before we take two steps forward is a pragmatic view the technocrats are slowly learning [1 41] from its detractors.

The Role of Society
The will formed by economic, political, religious, and other social groups influence the role science and technology play in society. By the same token, the dissemination of science and the technology that follows, transforms social structures, behaviors, attitudes, and so on. “Conceived by man, technology eludes his control only in so far as he wants it to” [5]. In this sense, society defines technology by which inventions it chooses to use and develop in preference to others. Society is in essence the moral compass of technological progress. It is through the opinions and attitudes formed by society that technology finds it’s course. However, as the wheels of progress gain momentum and the complexity of the technology at hand increases exponentially[4 15], society may find it increasing difficult to affect meaningful change other than reacting to unanticipated calamities brought about as a consequence.

Another wrinkle in the fabric of technology is the opposing views of knowledge. The positivist see knowledge as objective and falsifiable, while social constructivists see it as subjective and open to human interpretation [4 18]. As a consequence, our attitudes towards technology are often times viewed from different perspectives. To gain a full understanding of the technology, Pool argues, we must “marry the positivist and social constructionist perspectives” [4 20] as the consequences of said technologies carry with it both the engineering and social attitudes.

Conclusion
History is replete with examples of technological progress and innovations breeding unanticipated or unwanted side effects, however, as we have seen we are too often powerless to affect them. The Industrial Revolution, while reducing manual labor, had and still has many negative consequences such as environmental degradation, stress related illness, and an inability to effectively realize better alternatives. Einstein observed that the splitting of the atom had changed everything, except mans way of thinking, whence we are destined to catastrophe. But mankind still has the ability to change their actions if not their thoughts. The challenge remains for society in its abilities to harness technology for the present while looking to the past for a rationalization and balancing its needs for the future if we are to progress. Is society progressing because of technology? Most likely, but do the machines we create push us in the direction of progress or is the human race simply becoming a more important part of the machine?



[1] Marx, Leo. Does Improved Technology Mean Progress. Technology Review. 1997.
[2] Marx, K. & Engels, F. (1848), The Communist Manifesto
[3] Ronell, Avital. David, Diane. The ÜberReader. University of Illinois,2007
[4] Pool, Robert. How Society Shapes Technology. Oxford University Press,1997.
[5] Salomon, Jean-Jacques. The uncertain quest: science, technology, and development. New York: United Nations University Press,1994.

Doggy Doo's and Don'ts

Have you ever noticed how dog walks are like social networks? Except they suss through the morning posts with uncanny olfactory precision before ever deciding on a comment. And while this amazing creation of man and nature manages all the pressing business before breakfast, without a computer or cell phone, they still have a long way to mastering the etiquette of our cat or defeating the urge to repeatedly clean our tires. It’s estimated that dogs cause 20-30% of stream pollution through direct runoff into storm drains, which eventually empty into the natural watercourse. What’s worse, a single gram of dog waste can contain 23 million fecal coliform bacteria while a child only has to come into contact with a single coliform to become seriously ill. Here are the top 5 reasons to scoop and tips towards improving sustainability.
  1. To protect the water supply
    Scooping is the most effective way to reduce impact on the water system. It can never be eliminated completely, so shoot for sandy or gravel surfaces which make pick-ups easier and facilitate natural erosion. Most dollar stores sell black scented plastic bags that work great at reducing exposure and nuisance. Keep away from storm drains or other public water works and steer towards overgrown areas rich in vegetation for urination. The high nitrogen and phosphate content can burn grass and plants but are disposed of readily by weed beds our other dense growth.

  2. To protect children from disease
    Pregnant women or children coming into contact with dog feces can become seriously ill, or worse. Safety dictates staying clear of neighbors yards with children, schools, public playgrounds, or anywhere children might play. Encourage children to wash after playing, especially where dogs may be present, and keep dog waste and tools childproof.

  3. To monitor your dog’s health
    Monitoring a dog's stool for changes is not that much different than for humans. Frequency, duration, and all the other fine points can help you gauge if your K-9 needs special attention or it’s just the left-over burrito wrapper absconded from the compost bin. Walk before feeding to reduce bloat and provide your dog the mental satisfaction of working for their food. After walking and feeding they’ll want to sleep for a few hours which helps reduce the anxiety of everyone leaving for the day. Repeat when you get home in the evening and before long the process will run like clockwork.

  4. To respect your community
    Each week local authorities in Britain receive over 5,000 calls concerning dog fouling, and while more is being done to provide sanitary compost bins in public places, it remains the civil duty of owners to uphold the health and safety of the public. Dispose of waste in properly marked containers, compost or bury waste rather than trash it at the curb where it ends up in landfills as a biological pollutant. The simple gesture of picking up and avoiding zones where children play will earn you respect with your neighbors, help reduce environmental impacts, and improve your community’s sustainability.

  5. It’s the law
    In large cities around the world, fines for not picking up range from $100 in New York to $600 in Paris and $750 in London, often times with “zero tolerance” for owners caught in the act. Authorized employees of New York City’s Departments of Health, Sanitation, or Parks and Recreation can act in accordance with Section 161.03 of the New York City Health Code:


    "A person who owns, possesses or controls a dog, cat or other animal shall not permit the animal to commit a nuisance on a sidewalk of any public place, on a floor, wall, stairway or roof of any public or private premises used in common by the public, or on a fence, wall or stairway of a building abutting on a public place."
If you have a tip for greening up your dog walk or another sustainable story you would like to share, please feel free to send me your feedback. All of your comments and questions are welcome.

PEI is Going Green

Cresting the Confederation Bridge onto PEI, one realizes they are entering a different place and senses even a different time. Rising cliffs of rich red clay scared by relentless sea and wind rise up from the Atlantic into fog settling over the vast rolling farmland island. Boat loads of lobster head back to the fishing villages and lighthouses dotting the distant coastline. The long forgotten smell of earth and sea carry on the wild winds. There are no expressways or skyscrapers, sub-ways or public transportation systems, yet this little province manages to lead the way in Green initiatives despite size and location.

Prince Edward Island’s wind farm at North Cape is able to supply almost 6% of PEI’s annual electricity usage and research is underway into creating a hydrogen village that will convert unused energy from the wind farm into hydrogen and store it for future use. PEI wants to raise its wind energy to 15 percent by 2010.

The Government of PEI has developed a unique approach to waste management. In fact, PEI is the first to have a province wide waste source separation system. In 2003, PEI’s wastewatch.ca program recorded an incredible 65% diversion rate. PEI banned non-refillable soft drink bottles way back in 1977, and soft drink cans in 1984. Today, the return rate on Prince Edward Island’s soft drink and beer containers stands at close to 98 percent. This is the highest in North America.

Cities, businesses, and citizens of PEI have started to embraced green technologies and are realizing the advantages of eco-friendly approach on their pocket books as well. The city of Charlottetown uses renewable energy technologies such as biomass-fired district energy systems that provide steam to its 64 customers and 84 buildings. To do this, roughly one million litres of hot water are distributed through special, Danish-built, thin-wall steel inner piping, which is encased in foam insulation with an outer steel casing. The hot water is distributed from the Charlottetown District Energy Plant at 85°–120°C, and it returns at 70°–90°C. Thermal losses from the system are very small relative to the amount of heat being transported to all the end users.

Individuals like my friend Dan Viau installed and operates an outdoor wood furnace behind the toy factory adjacent to his house. Dan supplements about 20 cords of wood annually with waste from the toy shop and is able to keep his home, factory and shop heated throughout the cold PEI winters at significant savings to his wallet and the environment.

There are concerns however, as PEI residents rely exclusively on groundwater for their drinking water and nitrate levels are high due to farming practices. One in five wells tested displayed nitrate levels above Health Canada regulations. A joint federal study showed that if farmers in the watersheds stopped using fertilizers today, it could take 20 years for nitrates to come down to a normal level. Interestingly, before the turn of the century, lobster bodies were used as fertilizer due to their low market value and abundance at the time!