Light the Cities of the Future
A previously unlit cycle path in the Netherlands has recently drawn our attention. It has been resurfaced with a material that consists of thousands of shining stones in order to create a well-lit route. The Van Gogh Path, so called after the artist who lived in the town of Nuenen in 1883, combines the traditional with the contemporary in a gesture that acknowledge ledges Van Gingh’ masterpiece The Starry Night, but also shows the way ahead for city lighting. The Van Gogh Path is not a single case; it is not difficult to foresee a time when natural materials could help light the cities of the future.
Why should we care about city lighting? What’s wrong with current electrical city lighting anyway? Well, the problem that it causes is two-fold. First, of course, electrical lighting in most cities comes from non-renewable resources. According to the International Energy Agency, almost 20% of global electricity is consumed for lighting, which is responsible for high levels of carbon emissions. But there’s also the belief that electrical light itself is a form of pollution by destroying our view of the night sky.
From the above reasons, then, it seems wise to investigate other approaches. The city of Glasgow is attempting to use intelligent street lighting to monitor how citizens interact with the urban landscape and minimize electrical consumption and thus emissions. This “Smart City approach” is seen by many as the way of the future, but some designers aren’t convinced. They are pioneering the altogether more original approach of using materials from the natural world in order to replace electrical light entirely. They believe that this new “technology” can one day completely replace microchips and digital systems as we find better ways of making use of the light-producing mechanisms (制) that already exist in the natural world.
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Are we greening our cities, or just greenwashing them?
Architecture and urban design is chasing a green fever dream. Everywhere you look, there are plans for “sustainable” buildings, futuristic eco-cities and aquaponic farms on the roof, each promising to add a green touch to the modern city.
All of these are surely good ideas at some level. They are trying to repair some of the damage our lifestyle has done to the planet. But, despite the rhetoric of reuniting the city with nature, today’s green urban dream is too often about bringing a technologically controlled version of nature into the city and declaring the problem solved, rather than looking at the deeper causes of our environmental and urban problems.
One of the most striking examples is Apple’s “spaceship” campus now under construction in Silicon Valley. Though it seems to be sustainable and energy efficient—80 percent of its 175-acre site is preserved for landscaping, it is by any measure a huge, expensive and massively resource-intensive project. As a suburban white-collar workplace, it must include vast garages for 13,000 Apple employees. Thus, it will leave no smaller environmental footprint than a traditional office park.
Designing a perfect green building or eco-city isn’t enough to save the world. Although our buildings, like our cars, have been inefficient environmentally, architecture isn’t directly responsible for humanity’s disastrous environmental impacts. An economic system based on the destruction of nature is the real problem. No green building can help us repair the ecological damage we have caused, nor can any number of aquaponic farms bring us back to the real nature.
Instead of adding “nature” to the urban lifestyle, architects may work to design better relationships between our cities and nature, and to promote just relationships between the people in them.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Effects of Acid Rain
After studying the Hubbard Brook Forest and other areas, researchers found several important effects of acid deposition, more commonly referred to as acid rain, on both natural and man-made environments. Aquatic (水生的) settings are the most clearly affected because acidic precipitation falls directly into them.
As this acidic liquid flows into larger bodies of water, it is diluted (稀释). However, over time, acids can increase and lower the overall pH of the body of water. Acid deposition also causes clay soils to release aluminum and magnesium, further lowering the pH in some areas. If the pH of a lake drops below 4.8, its plants and animals risk death. It is estimated that around 50,000 lakes in the United States and Canada have a pH below normal (about 5.3 for water). Several hundred of these have a pH too low to support any aquatic life.
Aside from aquatic bodies, acid deposition can significantly affect forests. As acid rain falls on trees it can make them lose their leaves, damage their bark, and stunt their growth. By damaging these parts of the tree, it makes them vulnerable to disease, extreme weather and insects. Damage to forests by acid rain is seen all over the world, but the most advanced cases are in Eastern Europe. Half of the forests in Germany and Poland and about 30 percent in Switzerland, are estimated to have been damaged.
Finally, acid deposition also has an effect on architecture and art because of its ability to corrode certain materials. As acid lands on buildings (especially those constructed with limestone), it reacts with minerals in the stones, sometimes causing them to disintegrate and wash away.
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Public Opinion Counts
Modbury is a typical small town of the south of England with a population of about 1,600. Typical, that is, apart from the fact that there are no plastic carrier bags in the town. None. Plastic bags have been well and truly dumped!
The removal of the plastic bags was the brainchild of Rebecca Hosking, Modbury resident and documentary-maker. Filming a documentary in the Pacific Ocean, Rebecca was horrified at the effects of plastic bags on the wildlife off Hawaii. Among other things, she saw seabirds fatally trapped in plastic bags that don’t biodegrade. When Rebecca returned to her hometown, she discussed this problem with people, including the shopkeepers and everyone supported her suggestion to make the town plastic bag free.
But for Rebecca’s concept, Modbury would still be an unremarkable little place. Now, however, shoppers take re-usable cotton bags shopping with them, or they buy biodegradable corn starch ones on the shops. The shopkeepers now wrap their goods in paper. To prove that the townsfolk are not only committed to reducing plastic waste, they organised a mass beach clean-up last year. Dozens of volunteers came to the beach on the appointed day to clean it up, taking the rubbish that visitors throw away and recycling it. And the greatest part of that rubbish was... no, not plastic bags, but plastic bottles.
Becoming the first town in Europe to ban plastic bags, Modbury is now harvesting the rewards of fame — reporters and camera crews from newspapers and TV channels across the world are coming to this mild town to find out its secret. And, contrary to some of the initial reports, it is a normal town, trying to live life in a slightly different way. As one resident put it. “We’re ordinary people, but we want to make just a little difference.”
Life On Venus?
Cats Make for Ideal Human Companions
Cats have a reputation for being colder and less cuddly (令人想拥抱的) than their counterparts—dogs. In reality, they form close bonds with their owners and provide a sense of companionship, particularly for women. In fact, the findings of one Austrian study show that owning a cat is the emotional equivalent of being in a romantic relationship.
Some people feel silly talking to their pets, since, of course, they can’t respond. But interacting with your feline (猫科的) companions has proven health benefits. Not only does talking to your cat improve your bond, but it’s also said to be beneficial to your mental health by helping to improve your mood, lower your stress levels, and reduce our feelings of loneliness.
Cats are experts at sleeping, so it’s perhaps no surprise that they can help improve your sleep, too. A Mayo Clinic study found that people who slept with their pets in the same room were almost twice as likely to get a good night’s rest, with only 20 percent saying that they found their pets’ presence destructive.
Cats may not be able to help with the housekeeping, but they can assist in keeping your house free of mice. It turns out there’s some truth behind the cartoon cat-and-mouse chase. When mice smell certain proteins in cat saliva (唾液), they become tearful and therefore avoid the area.
It’s important for children to learn to care for and look after a living thing, just as their parents take care of them. Cats can help children develop social skills as they learn to approach the feline carefully and gently. Looking after a cat also encourages a sense of responsibility.
In addition to filling your heart with love, cats can contribute to keeping your heart healthy. Numerous studies have shown that owning a cat can help reduce your blood pressure and heart rate, as well as lowering your triglyceride (甘油三酸酯) and cholesterol levels, thereby reducing your risk of having a heart attack or stroke.
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Are People Unique?
It is human beings' pride that we are the only species on the Planet that can speak and think. However, recent research casts doubt on that common belief.
Zuberbuhler, a psychologist at St Andrews University, and his colleagues recorded thousands of calls made by Diana monkeys and noticed that the monkeys adapted their calls to change the meaning to warn one another about different situations. For example,they made a "krack" alarm call at the sight of a tiger. However,when they merely repeated calls made by other monkeys they added an "oo".
The researchers found that the same calls would be recognized by other species, like Campbell's monkeys. So they are communicating across species."And since then we have found that hornbill birds can understand these calls and they too can understand all the different meanings, said Zuberbuhler. What is also surprising is that signs of intelligence have been found in birds whose small brains were long assumed to be a complete barrier to intelligence. However, all that is changing fast. A few years ago, Irene Pepperberg of the Massachusetts Institute of Technology taught a parrot to recognize and count up to six objects, which couldn't have been achieved if birds were unable to memorize.
Last year that was topped by Alex Kacelnik, a professor of behavioral ecology at Oxford, who discovered that crows (乌鸦) are capable of using tools in complex orders, the first time such behavior had been observed in non-humans. In an experiment seven crows successfully grabbed a piece of food placed out of reach using three different lengths of stick. Crucially, they were able to complete the task without any special training, suggesting the birds were capable of a level of abstract reasoning normally associated only with humans.
All this is powerful evidence against the idea that people are unique.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Bears and humans often meet in National Parks. Although campers and hikers are warned not to fed the bears, many people ignore these warning and feed the beasts anyway. When bears are used to people's food, problems soon arise.
Bears like to cat a large variety of things, both meat and vegetable. Without human assistance, bears live nicely on roots, twigs, leaves of trees, insects and small animals. With people around, the bears’ tastes quickly expand to in-chide sandwiches, hot dogs, hamburgers, and anything else they can temp humans into giving up.
Bears often develop clever strategics for getting people to let go their food supplies. More often than not, an unsuspecting hiker has taken off his or her pack for a rest only to have a bear charge out of the woods, grab the pack and quickly disappear into the underbrush with it. Hanging the pack on a tree branch won't help. Bears have been known to climb up, jump off, and catch the pack on the way down. One mother bear stretched up with her baby on her shoulders to reach a pack stored on a pole. Many bears threaten people into giving up their supplies. Although a bear is unlikely to attack a person and would probably run away if screamed at, few people are willing to do so. Most people drop the pack and run the other way. This, of course, delights the bear.
In some places, the Park Service installed some metal barrels with lids to help campers keep their supplies safe from bears. Although the bears were unable to open these containers, the effort was less than successful. Most campers, unable to tell the metal drums from rubbish cans, never used them for the intended purpose.
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
