Monday, July 12, 2010

Honeybees Test Air Quality at Airports

Honeybees Deployed to Test Air Quality at German Airports

July 5th, 2010  Yale Environment 360

German officials are trying a novel approach to monitor air quality at airports; so-called “biomonitoring” by honeybees. In an effort to gauge air pollution levels from jet exhaust and ground transportation vehicles at Düsseldorf International Airport and several other airports nationwide, officials test honey from honeybees kept at the airports. In a recent test of honey collected from some 200,000 honeybees, officials confirmed that levels of some hydrocarbons and heavy metals were well below national safety standards. The honey, called Düsseldorf Natural, is then given away as gifts.

While some community groups in the U.S. and elsewhere have expressed concerns about air pollution levels at airports, industry groups insist that tighter oversight and improved energy efficiency in recent decades have significantly lowered air pollution from jet exhaust. Although officials in Germany say the use of bees to monitor air quality will not replace traditional methods, Martin Bunkowski, an environmental engineer for the Association of German Airports, told the New York Times that the practice sends “a very clear message for the public because it is easy to understand.”

Monday, July 5, 2010

Toxin Threatens Ohio Wheat Crops

Toxin Threatens Ohio Wheat Crops


By Associated Press July 03, 2010

Troy, Ohio 

A toxin found at high levels this season in wheat has meant lower income for some Ohio farmers.

Levels of vomitoxin are the worst in seven to 10 years in some areas, said Pierce Paul, a plant pathologist and small-grains specialist with the Ohio State University Extension Service. He says the toxin has thrived in parts of the state due to a cool, wet May that allowed fungus to grow.

The pathogen limits use of the wheat for humans, and Paul said producers should be wary of feeding the infected wheat to livestock, particularly swine.

Roland Sink, who raises wheat in Newberry Township in southwest Ohio, said this year's crop is the worst he's harvested in 40 years. He says he's lost about $9,000 on this year's 125-acre crop.

Sink, 60, said he lost an average of $1.25 per bushel because of vomitoxin and the wheat's low weight. The current bushel price is $4 and his worst load of wheat was docked by almost $3 per bushel, he said.

Vomitoxin can decrease the appetite of animals and long-term exposure can lead to gastrointestinal and immune system problems in people.

Bullish on Biofuels

Woolsey, Khosla: Bullish on Biofuels


What should we do with corn?

Shove it into cows that become fatty, high-cholesterol meat that contributes to heart disease? Turn it into cheap sugars that make people fat or sick?

Or use it to produce biofuels that will help reduce the U.S.’s dependence on Middle East oil, improve our balance of payments and create jobs instead of funding terrorists?

That’s a loaded question, of course, but that’s the way that James Woolsey, the former head of the CIA who is now a venture capitalist, put it to a friendly audience of biotech executives.

The biofuels industry has been subject to “propaganda” and “false narratives,” he said

Putting a new twist on the food-vs.-fuel debate, Woolsey argued that there’s plenty of acreage to grow corn and, in any event, that corn is better used as a biofuel to replace oil than it is to make “cheap junk food” so that the “grocery manufacturers association can make more money making our children obese.”

“We need to go on the attack,” he declared.

No wonder he’s been called a “green hawk.”

Woolsey, a partner at VantagePoint Venture Partners, and Vinod Khosla, the venture capitalist and relentless advocate of biofuels, spoke today to BIO’s World Congress on Industrial Biotechnology and Bioprocessing at the National Harbor convention center, just across the Potomac from Washington, D.C.

Woolsey’s a lawyer and a Washington veteran who has worked for Republican and Democratic presidents, so he focused on the politics and economics of biofuels and bioplastics. Silicon Valley-based Khosla, who was trained as an engineer, presented slides packed with dense chemical diagrams and formulas.

Both argued that the biotech industry can find ways to use agricultural products and advanced chemistry to create new fuels and feedstocks that will compete with and gradually replace petroleum-based products.

Woolsey, who drives an electric car, talked briefly about electricity, arguing on behalf of distributed rather than centralized power generation. He described today’s transmission grid as “very, very troubling structure” because it is vulnerable to blackouts, hackers and terrorism.

“If we could gravitate—not jump, but move over time—to a much more distributed electric grid, towards micro and mini-grids, we would have a much more secure and much more resilient electrical structure,” he said. That would also create opportunities for small-scale biomass generation.

Mostly, though, he focused on the economic and security risks of the U.S. dependence on OPEC oil. “We’re borrowing about $1 billion a day just to import oil,” he said.

We can’t drill our way out of the problem, he said, and nor can we expect the energy and climate bills pending in Congress, which will put a price on carbon emissions, to take care of the problem. “A $25 a ton price for CO2 in a cap and trade system adds about 25 cents a gallon to the price of gasoline,” he said, not enough to have a big impact.

Instead, he called for open standards that will require new vehicles to operate not just on gasoline but on ethanol or methanol. In Brazil, he noted, most cars on the road can use gasoline or ethanol, which allows competition to flourish. (Lowering tariff barriers to Brazilian sugar cane would help, too.) “If we were close to being as decisive and focused as the Brazilians, we would have done this some time ago,” he said.

For his part, Khosla identified a range of private startup companies that are exploring different technologies to produce biofuels. Khosla Ventures has backed, among others, Amyris (which has filed to go public), Kior, New Zealand-based Lanza Tech, Coskata (whose investors include General Motors, TOTAL and the Blackstone Group), Range Fuels, HCL Clean Tech, Mascoma, bio-butanol maker Gevo and LS9. Here’s a great diagram of all of Khosla’s expansive clean tech portfolio.

Any one of them, or others, could generate a breakthrough, he said.

“You will not see incremental improvements, as most people assume,” Khosla said. “There will be a few black swans—rare, extreme impact and retrospectively predictable events.”

Segetis, Draths and Reluceo, meanwhile, are all so-called green chemistry companies, developing bio-based materials.

As Khosla acknowledge, all these startups face challenges as they try to develop supply chains with ample feedstocks, bring down their production costs and raise the money they need to get to scale. “These technologies have moved along fairly well, but the financial world has gone backward,” he said.

But Khosla, who made a fortune investing in software and Internet startups, sounded optimistic. Clean tech startups like First Solar and Soraa already have leapfrogged bigger companies like Shell, BP and Phillips in such technologies as solar PV and LED lights.

“Almost all innovation comes out of small companies,” Khosla said.

True enough, but they will have to get big fast to play a major role in dealing with the climate and energy crisis.

Friday, July 2, 2010

Renewable Energy Plane Prepares For 24 Hour Flight

Solar Impulse Prepares to Launch a 24 Hour Flight in a Plane Run on Renewable Energy


Posted On: Today

Using renewable energy from sunlight as a means of creating solar powered aircraft has been around since the late 1970s. However, what few manned aircraft that were successfully run on solar power had extraordinarily limited potential. The Gossamer Penguin, for example, was so small that the team behind the aircraft had to use a 100 pound pilot to ensure the Penguin could stay off the ground. Most projects in the solar aviation field that are capable of long term flights tend to be unmanned, like NASA's Pathfinder and Pathfinder Plus which have flown to altitudes of 75,000-85,000 feet on separate occasions. For the first time, however, a team of Swiss aviation experts are preparing themselves to fly a solar powered aircraft around the globe.

The Solar Impulse project, which has been underway since 2003, hopes to revolutionize the use of renewable energy from solar power in aviation and other fields. By creating a solar cell that is capable of holding a long lasting charge and staying light enough to allow an aircraft to fly with ease, the Impulse group thinks they can find a variety of applications should the project eventually prove successful. The Solar Impulse aircraft achieved its first test flight as a prototype last year in Germany where the design showed promise as an easily controlled and maneuverable aircraft. Yesterday, the team had hoped to reach the next step in the project by flying for 24 straight hours before a technical malfunction forced them to delay the flight.

Designated the HB-SIA, the planned test flight for the craft would have launched in the early morning and flown throughout the day to allow the solar power cells onboard to continue collecting that renewable energy and maintain a full charge. Ideally, as the sun set the HB-SIA would have been able to fly throughout the night on the charge and been able to safetly land back at the Swiss airport they left from previously the next morning. The malfunction that kept the team grounded, however, was a key component that would have allowed the ground control to monitor the progress of the craft at all times for safety reasons. Without that device functioning, the team felt the safety of the flight could be compromised and were forced to delay. Though a date has not been set the team hopes to get underway before it becomes to late in the year and the days become in winter. Shorter days would obviously mean less sunlight, and the crew does not believe it would be sufficient to allow a full charge for night flight.

Once the flight is rescheduled and successful, the Solar Impulse team will be prepared to achieve their ultimate goal in flying a renewable energy powered plane. The team hopes, that by 2011 or 2012 they will be able to fly the final version of the HB-SIA on a month long trip around the globe entirely on solar power. The final craft will have a wingspan in excess of 220 feet and will include a pressurized cabin allowing the crew to maintain the higher altitudes needed for such a flight. Hopefully the Solar Impulse project will be able to get far enough to accomplish just that, allowing the rest of the world to see one of the most exciting circumnavigations of the globe in years on a plan entirely powered by renewable energy.

The Plastiki Expedition 2010: "Message In A Bottle"


The Plastiki Expedition

April 8, 2010

The Plastiki began her adventure nearly four years ago after taking inspiration from a report issued by UNEP called ‘Ecosystems and Biodiversity in Deep Waters and High Seas’ and Thor Heyerdahl’s epic 1947 expedition, The Kon-Tiki. True to Adventure Ecology’s values, a compelling and pioneering expedition was needed that would not only inform, but would also captivate, activate and educate the world that waste is fundamentally inefficient design.

The Plastiki Expedition is a bold adventure that aims to capture the world’s imagination and draw our attention to the state of our oceans. The proposal is to build a boat from plastic bottles and recycled materials, which will then be sailed across the Pacific Ocean from North America to Australia.

Their philosophy is about recognizing that waste is fundamentally a design flaw (it does not appear in nature) It’s about re-thinking waste as a resource. It’s about cyclical ‘cradle-to-cradle’ philosophies rather than linear thinking when it comes to how we design our world. It’s about a better understanding of the lifecycle’s and materials used in our everyday lives. It’s about being curious and open, being prepared to let go of assumptions in order to undertake a new ‘Planet 2.0’ way of thinking and acting. It’s about acknowledging that we don’t have all the answers and that nobody is as smart as everybody.

It’s about being collaborative and curious so to engage multiple perspectives, skills, opinions and organizations. It’s about constantly learning, unlearning and re-learning. It’s about re-integrating back into the web of life by recognizing and reducing our human fingerprints on the natural world. It’s about moving on from just articulating the problems and inspiring action of the solutions. It’s about encouraging the world to reduce, reuse, recycle and rethink more of the planets natural resources. It’s about delivering a spectacular global “Message in a Bottle”.

We can understand the project better by taking a look at their inspirations, in which they mention the book Cradle to Cradle by William McDonough & Michael Braungart, where they argue that the conflict between industry and the environment is not an indictment of commerce but an outgrowth of purely opportunistic design. The design of products and manufacturing systems growing out of the Industrial Revolution reflected the spirit of the day-and yielded a host of unintended yet tragic consequences.

The early design sketches show us the initial construction ideas for the boat:

The ship is equipped with advanced recycling practices including; bouyancy from bottles, two wind turbines, solar panels, pedal power, rigging and sails made from recycled PET bottles, recycled aluminum mainstay, structure from PET fabric and foam attached with a sugar and cashew-based epoxy as well as a geodesic, reusable cabin, recycled waste water protocol, hydroponic garden and rain water reclamation practices.

The four month voyage is carrying The Plastiki through a number of environmentally sensitive regions. The most notable of which has been ominously named the ‘Eastern Garbage Patch‘, a region six times the size of the United Kingdom where vast quantities of plastic pollution have accumulated because of the currents. It is a gyre of marine litter in the central North Pacific Ocean located roughly between 135° to 155°W and 35° to 42°N. Although many scientists suggest that the patch extends over a very wide area, with estimates ranging from an area the size of the state of Texas to one larger than the continental United States, the exact size is unknown.

Thursday, July 1, 2010

The Scientific Flash Behind The Fireworks

By: Doug Kanter

How
pyrotechs use physics and chemistry with flair








It takes some precise chemistry and physics to pull off multicolored displays like this Fourth of July fireworks show over the Manhattan skyline.

As you ooh and aah at the dazzling explosions of a fireworks display, there are three things going on that you probably wouldn’t guess: The chemists who made those pyrotechnics designed most of them so they wouldn’t explode, you’re actually seeing nature conserving energy, and most peculiar of all, when things are at their flashiest, you’re actually seeing the fireworks as they’re cooling down.

The rockets' red glare, and all those bombs bursting in air, are the product of pyrotechnic chemistry that’s been refined ever since the Chinese first started using black powder for noisy fireworks to scare away evil spirits.

The basic ingredients in black powder, and all fireworks, are the same as they’ve always been: a fuel source and an oxidizer. The fuel’s job, like the wax in a candle, is to provide heat. The oxidizer is there to provide more oxygen that the ambient air can supply, to accelerate the reaction - to speed up the burning.

Slower is better

But there’s more to making a basic firework than putting the ingredients together. Good visual effects come from a slower reaction. Pyrotechnic chemists, who are trying to create bedazzle instead of bang, don’t want their work to explode.They want it to burn for a bit so it gives a good visual show. To achieve the desired effect, the size of the particles of each ingredient have to be just right, and the ingredients have to be blended together just right.

To slow down the burning, chemists use big grains of chemicals, in the range of 250 to 300 microns (the size of a small grain of sand), and they don’t blend the ingredients together very well. That makes it harder for the fuel and oxidizer to combine and burn, and produces a longer and brighter effect.

For the really sparkly parts of fireworks, they use even bigger grains, roughly 1,000 microns in size, which are ignited by the black powder fire around them and combine with the air to burn with a spark effect.

A good example of the fuel/oxidizer/sparkle combination is - duh - the sparkler. It’s made of medium-sized grains of fuel and oxidizer to get the fire going, mixed with even bigger grains of aluminum.

When ignited, those grains burn in combination with the oxygen in the air, giving off the sparks. Aluminum burning at 2,700 degrees Fahrenheit (1,500 degrees Celsius) produces golden sparklers. At hotter temperatures, up to 5,400 degrees F (3,000 degrees C), the aluminum produces white sparks.

Beyond the basics

Well, so much for the basics. Now what about color? There are other chemicals used to produce colors, but they all only do their dazzling thanks to the first law of thermodynamics: Nature conserves energy. Energy from the fire in the basic fuel is transferred to the atoms of the colorant chemicals. That excites the electrons in those chemicals into a higher energy state. The electrons literally orbit further away from the atom’s nucleus.

Then, as they cool down, they move back to a lower state of energy. But remember, nature conserves energy. Energy is never lost, it’s just transferred somewhere else. As the electrons “calm down,” the energy they give up is converted into radiation. Light. That’s where the light of fireworks comes from. You actually see the colors in fireworks as they’re cooling down.

The signature chemicals in fireworks each emit light at a specific wavelength, producing a specific color: strontium equals red ... copper equals blue ... barium equals green ... sodium equals yellow/orange. Just as you could combine crayon colors when you were a kid, combining the colorant chemicals can give you additional colors. Strontium (red) plus copper (blue) equals purple.

The chemists produce little pellets of colorant chemicals, the size of sugar cubes, with a mixture of colorant and basic fuel blended to the right degree, and with the right-size particles so the pellet will burn at the desired rate. Then technicians can calculate how high they have to shoot their shells so they’ll be done burning before the pieces get back down to the ground.

Magic tricks with light and sound

Design artists then figure out how to get the fireworks to explode in shapes, and with sounds. The familiar whistling sound is easy. They pack some basic fuel into a cardboard tube, open on one end. As the fuel burns down inside the tube, the carbon dioxide it gives off rushes out the open end, making a whistling sound. It’s like when you whistle by blowing air out between your pursed lips.

Employees of Alonzo Fireworks set up tubes for a fireworks display in Amsterdam, N.Y. The tubes serve as launch pads for cardboard-covered shells that contain an artfully blended mix of explosives and other chemicals.The shapes of the exploding lights depend on how the basic fuel and colorant pellets have been packed. If the explosive charge in the shell is in the middle, surrounded by a ring of pellets of sodium, when the timer fuse sets off the explosion, it ignites the sodium pellets and shoots them out into that familiar nice round yellow/orange circle. Two rows of colorant pellets around a central “bomb” gives you a double ring.

If the inside of the shell is a mix of basic fuel and colorant all interspersed, the explosion ignites the colorant pellets that then spread out and fall down in a shower, producing a glowing willow tree pattern.

To get the really tricky shapes, like stars or hearts, the colorant pellets are pasted on a piece of paper in the desired pattern. That paper is put in the middle of the shell with explosive charges above it, and below. When those charges go off, they burn up the paper, and send the ignited colorant pellets out in the same pattern they were in on the sheet of paper, spreading wider apart as they fly.

Consumer-level fireworks, which are legal in most states, are made of the same chemicals the commercial shows use. The fireworks industry says that U.S. consumption of commercial fireworks (the big outdoor shows) plus consumer fireworks is up 400 percent since 1976, and that injuries are down 44 percent over the past four years.

But then there was the guy who stuck a lit firecracker up his nose! Honest. Or the folks who burned their house down using fireworks indoors. So if you’re going to use “home” fireworks, remember: Knowing the science behind how they work doesn’t mean they’re risk-free!

Be careful while you enjoy the show!

How Can A Bag Of Chips Cost Less Than An Apple?

How Can a Bag of Chips Cost Less Than an Apple?


By Daphne Oz
April 14, 2010

Why does eating healthy food usually mean shelling out more money? How can raw fruits and vegetables that come right out of the ground or off the vine cost more than processed junk food that's spent a few days in a factory? Daphne Oz goes looking for answers.

Over the past couple months, I've found it hard to ignore how difficult it has become to eat healthily. Since graduating college and moving out on my own, I've had to learn how to navigate the treacherous terrain of managing a budget. Of all the new expenditures that come along with life outside the nest—utilities, cable, gym—I was most shocked by how expensive the food I wanted to buy was. And I wasn't looking to buy beluga caviar—I'm talking about organic cottage cheese versus conventional; fresh-squeezed orange juice versus from concentrate.

As I began to look over my receipts and peruse the aisles of my local grocery and health food stores, I noticed an obvious (and disturbing) trend. The more heavily processed and artificial a food, the less expensive it was. How is it that something that you eat exactly the way it looks when it comes out of the ground or off a tree can cost more than something that went through a day and a half of mechanical digestion by heavy machinery? Doesn't it strike you as a bit odd that our supermarkets are crammed with 99-cent bags of chips, but apples can cost $1.25 or more? Or that a hamburger at a fast food restaurant might run just less than $4 compared to a large salad, which can cost twice that.

Look at the example of a hamburger. First you have the beef (which involves raising livestock, slaughtering them, processing the meat, potentially freezing it and shipping it to the point of sale). Then you have the bun (which is processed flour, meaning all the wheat had to be grown, harvested, ground, mixed, baked and then shipped). Now add whatever other vegetables and spreads might be included. You get all this for $4. But what if you want to eat a head of lettuce and some dressing? It's going to cost you twice the amount? How can this be?

Back in the early 1900s, the U.S. government invested in an agriculture policy that aimed to promote production of those foods that could be easily stored or shipped to soldiers fighting in World War I, like corn and wheat. To make sure we had plenty of these grains, we decided to pay farmers to grow more of the crops we needed most—and consequently stop growing most other grains, vegetables or fruits. This practice is what we now know as subsidizing.

Because government money could be used to cover some of the costs of production, the price the consumer had to pay for these items fell. Of course, with this lower price came higher consumption. As demand grew, so did our production levels.

Today, 30 percent of our land base is being planted with corn. Even out of wartime, we have continued to subsidize corn and wheat production, adding canola and soybeans to the list, largely because beef, pork and chicken growers demand these crops be constantly available at the lowest possible price—which means meat producers can also be counted as recipients of subsidies.

As we produced more and more grain, our supplies eventually surpassed the demand. To help get rid of some of this overstock, we commissioned farmers and scientists to find new things to do with these stores. While farmers began feeding corn and wheat to animals that had never eaten these plants before—like cows and fish—scientists ingeniously found ways to convert these crops into a variety of different forms. Some experts estimate that corn derivative products exist in nearly 90 percent of all processed foods.

It might not look like corn on the outside, but many of the processed food items available to you, whether we're talking crackers, candy bars or soda, are made from corn in the form of high fructose corn syrup. In addition, many of those obscure terms you might not recognize on the ingredient label—maltodextrin, xanthan gum, saccharin, di-glycerides—are corn derivatives. Corn is also the main feed for most meat and poultry animals, so there's corn in that grilled chicken sandwich too. One striking example: Farmed fish are now being taught to eat corn for the first time ever! So not even your sushi is corn-free.

Today, we spend nearly $25 billion in subsidies to fund farmers of corn, wheat, soybean, canola, beef, pork, chicken and dairy. The result is that farmers can charge the consumer much less than the price it costs to produce these foods and make up the difference through government funding. This might sound like a good deal for us at first—we get something for cheaper than we should—but the reality is that it has completely distorted the position and predominance of these foods in our eating hierarchy because they are so much cheaper.

In fact, you actually do pay more for these foods than what the grocery store receipt says. Those subsidies are your tax dollars, after all. And the true cost of industrial agriculture is almost impossible to calculate because we have no enforceable way of quantifying how much producers should pay to offset the pollution their operations create or the long-term damage to human health from overconsumption of certain foods and exposure to chemicals, hormones and antibiotics used in some cases.

Since we aren't being made to bear the full cost burden of our eating habits, of course we eat more than we would normally. It's hard to say exactly how much a pound of beef would cost if we took into account all the factors involved in getting it nice and neatly packed into a patty on your plate (feeding, housing and medicating the cattle, slaughtering and processing the meat, treating the meat for bacteria, pressing it into patties, shipping and storing it, plus the costs in environmental pollution from animal refuse and processing fuel, just to a name a few). If it were $20, how often would you indulge? I've heard figures as high as $90! Imagine how different your eating habits would be if you had to pay this every time you wanted a steak.

The point is, subsidized foods cost way less than they should and have a much larger presence in our lives as a result, and not because they're any easier to produce than regular old carrots. In fact, farmers of subsidized crops are charged with producing such a huge amount of food that their operations generally become much more complex, involving lots of machinery, medicines and chemical compounds to compensate for that fact that there is no possible way for them to manage their operations simply through human labor.

The worst of it is that American consumers are deliberately being kept in the dark when it comes to where, and how, and by whom their food is produced. Agricultural giants own the seeds, the fertilizer and pesticides, even the farms in some cases, and are well-equipped to limit how much can be said and how much can be done about their business practices. They spend money to divert your attention away from their operations—to make it difficult for you as a conscious consumer to discover what is going on, or to say anything about it if you do—because they're worried that, once you find out the truth, you might not want to buy their products anymore. And you know what? They're probably right.

Subsidies lay the groundwork for what's happening in our food system. What can you do about it? As a consumer, vote with your pocketbook. Create a market for affordable, accessible, healthy food by making sure that you opt for organic, local and humanely produced items whenever possible.

If you demand it and are willing to pay more for it, producers will supply it. Moreover, it may influence our government to actually start supporting family farmers who can produce the diverse array of food we need to be healthy, rather than funneling all of our collective tax dollar food subsidies into a few industrial producers.

While the pie-in-the-sky vision of a country teeming with a vast network of family-owned farms is still years away, there are ways to work within the current system to make foods healthier and safer for us all. A March 2010 Wall Street Journal article documented how some of the biggest players in the food business—such as Kraft Foods, ConAgra and PepsiCo.—are now taking high fructose corn syrup out of many of their products—such as Wheat Thins, Hunt's Ketchup and Gatorade, respectively. Why? Because their consumers asked them to put sugar back.

It's more expensive for producers to use sugar because corn subsidies make corn syrup a cheaper sweetener, but they're switching over anyway.

This just goes to show: In America, the consumer is king, and what we want is what we'll get. So how are you going to wield your power?