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London joins national campaign to banish the curse of the plastic bag

Novembro 15, 2007 · Deixe um comentário

 By Martin Hickman, Consumer Affairs Correspondent

Published: 14 November 2007

 

British shops hand out a staggering 13 billion every year. But after a decision by 33 London councils yesterday, plastic bags could be soon be consigned to history, unmourned by anyone who cares about cleaning up the environment.

Eighty villages, towns and cities, including Brighton and Bath, have introduced or are considering a ban on them since shops in the Devon market town of Modbury went “plastic bag- free”. But yesterday represented the most significant move yet. The capital is now on board.

All 33 authorities in the London Councils group voted for legislation to prevent shops in the capital handing out free plastic bags. In the next fortnight Westminster Council will present a private Bill to the House of Commons which would apply to every London shop from the humblest newsagent to Harrods.

Shoppers clutching large numbers of bags in London’s West End could become a thing of the past; instead they will be asked to use sturdy reusable plastic “bags for life” or cotton or string hold-alls. London’s authorities said they needed to halt the environmental damage done by plastic bags, which use oil and landfill space and kill marine wildlife.

The ban is likely to be opposed by big retailers such as Tesco which prefer encouragement rather than coercion to change behaviour. But campaigners point to international trailblazers that have already banned the bags, places as diverse as Tasmania and Tanzania, which this year were joined by Paris and San Francisco. London would be the biggest urban centre yet to take the plunge.

Peter Robinson, director of Waste Watch, said: “We’ve seen successful action taken on carrier bags all across the world from Australia to Zanzibar, and now it’s time for London to take a lead on this issue in the UK.”

Although the London ban could take years to come into force, the groundswell of opposition to free disposable bags is unmistakable – and perhaps unstoppable. Major retailers have signed an agreement with the Government’s waste body, Wrap, to reduce the environmental impact of plastic bag use by 25 per cent by the end of next year. They are making the bags more lightweight, exploring biodegradable options, and discouraging their routine distribution.

Tesco says it has cut its use of carrier bags by 1 billion to 3 billion after a high-profile campaign to give loyalty points to shoppers reusing them. Today Sainsbury’s will announce in its financial results that it has cut plastic bag use by 10 per cent as a result of having signs at the checkouts asking shoppers to consider the environment and promoting jute and cotton bags. Marks & Spencer is to chargeshoppers 5p a plastic bag after a trial in Northern Ireland that cut the number handed out by 66 per cent.

The Government says it is monitoring the efforts in commerce, but is set against a plastic bag tax of the kind introduced five years ago in Ireland, where the number of carrier bags has fallen by 90 per cent. Officials claim there is evidence that Irish shoppers are using other types of plastic instead. The plastic revolution was started by a BBC camerawoman, Rebecca Hosking, from Modbury, after she had seen the deaths of albatross chicks that had eaten plastic. In the absence of government action, 43 traders in the town decided to start their own “plastic bag-free town” in May. The shops refused to give out free plastic bags, charging 5p for a cornstarch bag, 10p for a paper one or £1.50 for a cotton carrier.

Trade did not fall off, and the six-month experiment proved so successful that Modbury has made the change permanentand made the carrying of a plastic bag an antisocial activity.

Other towns such as Hebden Bridge in West Yorkshire and Overton in Hampshire have followed suit, and the idea of going “plastic bag-free” is taking hold elsewhere, such as in Brighton, where councillors last month called on the city’s retailers to stop giving out bags.

The plastics industry insisted that such bans were environmentally harmful, arguing that re-use of plastic bags – to line bins, wrap packed lunches and scoop up dogs’ mess – made them more environmentally friendly than cotton alternatives, and that the oil used to make the HDPE (high density polyethylene) bags came from a by-product of oil.

Nonetheless, the industry says that unnecessary use of bags is a problem, and is calling on shoppers to consider whether they really need them. Peter Woodall, of the Packaging and Industrial Films Association, said: “We are losing the battle in terms of hearts and minds of the public, who now certainly believe that the plastic bag is a hazard to health and the environment and something we need to eradicate from society.”

Ms Hosking, who started the Modbury experiment, said that plastic bags were the start of a campaign against disposable consumer culture. “It’s our consumption of everything – whether it’s petrol, water or consumer goods – that is driving virtually every environmental problem on the planet and it needs to stop. We have shown that individual people can make a difference,” she said.

A local convenience, a global problem

Anyone who has seen The Graduate, one of the great movie classics, will remember vividly the single-word piece of advice that Dustin Hoffman’s confused young career-hopeful, Benjamin Braddock, receives from a well-meaning family friend: Plastics.

Asked to clarify what exactly he means, the family friend, Mr McGuire, explains: “There’s a great future in plastics.” And in 1967, when the film was made, no doubt there was.

Unfortunately, in the succeeding years, many aspects of what then seemed to be those oh-so-convenient, revolutionary, synthetic materials have come to appear not a blessing but a curse – and plastic bags are high on the list.

The trouble with them is that they have the vices of their virtues. They are incredibly cheap and light, and so are produced in astronomical, scarcely credible, numbers; and remarkably tough for their lightness, they are incredibly persistent in the environment once we have finished with them.

Nobody knows exactly how many plastic bags are consumed annually worldwide, but a good estimate is between 500 billion and 1,000 billion, which comes out at more than a million a minute – and then they’re all thrown away. But as they do not biodegrade, huge numbers don’t disappear. They have become the most ubiquitous item of litter. They are the icons of the throwaway society.

In parts of Africa, there are so many blowing through the bush that a cottage industry has sprung up in harvesting windblown bags and using them to weave hats, or even more bags.

But in some parts of the environment, they represent a lethal threat to wildlife, in particular in the oceans. According to the British Antarctic Survey, they have spread from Spitzbergen north of the Arctic Circle to the Falkland Islands at the other end of the globe.

When floating they can resemble jellyfish, and so are often mistakenly eaten by sea turtles and other marine mammals and birds, with fatal results.

No one denies plastic bags are satisfyingly convenient. But as Billy Joel sang, you pay for your satisfaction somewhere along the line.

Michael McCarthy

Source: The Independent.

Categorias: enviromental education · life style · pollution

Hell on earth: The 10 most polluted places on the planet

Setembro 17, 2007 · Deixe um comentário

Published: 14 September 2007

 

SUMGAYIT, AZERBAIJAN

Affected people: 275,000
Pollutants: Organic chemicals, oil, heavy metals including mercury.
Source: Petrochemical and industrial sites

Once a Soviet centre of industry and the location of more than 40 rubber, chlorine and pesticides factories, Sumgayit is now home to piles of untreated sewage and mercury-contaminated sludge. Cancer rates are up to 50 per cent higher than the rest of Azerbaijan and a birth defects are common.

SUKINDA, INDIA

Affected people: 2,600,000
Pollutants: Hexavalent chromium and other metals
Source: Chromite mines and processing

Home to 97 per cent of India’s chromite deposits, Sukinda’s mines spew out millions of tons of waste rock into the rivers that residents drink from. A quarter of nearby residents have pollution-related illnesses

TIANJIN, CHINA

Affected people: 140,000
Pollutants: Lead and other heavy metals
Source: Mining and processing

Tianjin, one of China’s largest lead-production bases, has no pollution controls. Forced to breathe air with 10 times the legal levels of lead, residents suffer lower IQs, impaired growth and brain damage.

CHERNOBYL, UKRAINE

Affected people: Initially 5.5m, now disputed
Pollutants: Radioactive dust
Source: Meltdown of reactor core in 1986

From 1992 to 2002, 4,000 youngsters born in and around the 19-mile exclusion zone that still exists around the destroyed reactor developed thyroid cancer. Five million people still live in contaminated areas.

DZERZINSK, RUSSIA

Affected people: 300,000
Pollutants: Chemicals and toxic by-products, including Sarin and VX gas. Also lead, phenols.
Source: Cold War-era chemical weapons manufacturing. The principal site of chemical weapons production during the Cold War, Dzerzinsk is now a centre of chemical manufacturing. Over a period of 70 years until 1998, 300,000 tons of chemical waste were dumped, leaching almost 200 chemicals into groundwater. The drinking water is heavily contaminated and the life expectancy for men is just 42.

NORILSK, RUSSIA

Affected people: 134,000
Pollutants: Air pollution – particulates, sulphur dioxide, heavy metals (nickel, copper, cobalt, lead, selenium), phenols, hydrogen sulphide.
Source: The mining and processing of nickel and other related metals.

The snow is black in Norilsk, and 16 per cent of child deaths at the former Siberian slave labour camp are caused by respiratory illnesses related to the city’s mining operations. Residents at the world’s largest heavy metals smelting complex suffer a horrifying range of illnesses including respiratory illnesses and lung cancer. Birth defects are common.

VAPI, INDIA

Affected People: 71,000
Pollutants: Chemicals, heavy metals
Source: Industry estates

At the end of India’s 400 km-long “Golden Corridor” of industrial estates, Vapi has more than 50 factories producing petrochemicals, fertilisers, dyes and paint, discharging dangerous levels of pollutants into the groundwater. Doctors report a high incidence of respiratory diseases and spontaneous abortions.

KABWE, ZAMBIA

Affected people: 255,000
Pollutants: Lead, cadmium
Source: Lead mining and processing

Children in Kabwe still bathe in the heavily polluted river that runs from the town’s lead mine, which ran without safeguards from 1902 to 1994. Many have blood lead levels considered fatal.

LINFEN, CHINA

Affected People: 3,000,000
Pollutants: Fly-ash, carbon monoxide, nitrogen oxides, sulphur dioxide, arsenic, lead.
Source: Automobile and industrial emissions

Linfen’s residents are forced to breathe the toxic output from hundreds of unregulated mines, factories and refineries. Clinics report an explosion in bronchitis, pneumonia and lung cancer.

LA OROYA, PERU

Affected people: 35,000
Pollutants: Lead, copper, zinc, sulphur dioxide.
Source: Heavy-metal mining and processing

The US owners of a metallic smelter in this mining town have failed to clean up the plant, which exposes residents to toxic emissions and waste. Ninety-nine per cent of children living in or around La Oyroya have blood lead levels that exceed safe limits and acid rain caused by sulphur dioxide in the air has decimated vegetation in the area.

From: The Independent.

Categorias: pollution

When bivalves ruled the world

Setembro 5, 2007 · Deixe um comentário

Paleobiologist studies how elevated

C02 affected ancient marine life

 

Before the worst mass extinction of life in Earth’s history – 252 million years ago – ocean life was diverse and clam-like organisms called brachiopods dominated. After the calamity, when little else existed, a different kind of clam-like organism, called a bivalve, took over.

What can the separate fates of these two invertebrates tell scientists about surviving an extinction event”

Margaret Fraiser, UW-Milwaukee assistant professor of geosciences, shows fossils of the few survivors of the Permian-Triassic mass extinction, the most severe in Earth's history.

A lot, says UWM paleoecologist Margaret Fraiser. Her research into this particular issue not only answers the question; it also supports a relatively new theory for the cause of the massive extinctions that occurred as the Permian period ended and the Triassic period began: toxic oceans created by too much atmospheric carbon dioxide (C02).

The theory is important because it could help scientists predict what would happen in the oceans during a modern “C02 event.” And it could give them an idea of what recovery time would be.

Studying the recovering ecology is equally significant, says Fraiser. The evolution of surviving species in the aftermath of the mass extinction set the stage for dinosaurs to evolve later in the Triassic.

From air to water Fossil records suggest that trauma in the oceans actually began in the air.

“Estimates of the C02 in the atmosphere then were between six and 10 times greater than they are today,” says Fraiser, an assistant professor of geosciences. It makes sense, she says. The largest continuous volcanic eruption on Earth – known as the “Siberian Traps” – had been pumping out C02 for about a million years prior to the Permian-Triassic mass extinction.



The time scale shows the expanse of time between the Permian-Triassic mass extinction and the less severe mass extinction that wiped out the dinosaurs.
Click here for more information.


The Permian-Triassic extinction wiped out 70 percent of life on land and close to 95 percent in the ocean – nearly everything except for bivalves and a fewer number of gastropods (snails).

C02 is a greenhouse gas that influences global temperatures. But, says Fraiser, according to the fossil record, high levels of C02 and the correspondingly low levels of oxygen do much more than that.

The hypothesis unfolds like this: High C02 levels would have increased temperatures, resulting in global warming on a large scale. With no cold water at the poles, ocean circulation would have stagnated. The oceans would have become low in oxygen, killing off life in deeper waters where there was no opportunity for water to mix with the little oxygen in the atmosphere.

More carbon dioxide would have been created as life forms died and microbes broke them down, which also would have created poisonous hydrogen sulfide. The oceans would have become an inhabitable chemical cocktail.

Follow the CO2 In fact, there have been many CO2 events in geologic time, and they’ve literally left their mark.

“You can see where the rock turned dark,” says Fraiser, pointing out different-colored layers in a fossil samples from the period. “That is an indicator of low oxygen at the time. These are from sites that were underwater at the beginning of the Triassic period.”

Fraiser, who has just finished her first year at UWM, is one of several new faculty in geosciences and its emerging paleobiology program.

She has collected fossil samples of the marine survivors from the period in what today are China, Japan, Italy and the western United States. The similarities of the fossils from all these locations have been surprising.

“It is unexpected to see that,” says Fraiser. “It appears that these bivalves and gastropods were the only survivors worldwide.”

They had all the right characteristics to tolerate the lack of oxygen, she says. They were tiny, shallow-water dwellers, with a high metabolism and flat shape that allowed them to spread out to extract more of the limited oxygen when feeding.

Toxic conditions also inhibited marine life from producing a shell. Size suddenly mattered for mollusks, and only the very small survived, eroding the balance of the marine food chain.

Ultra-slow rebound As she sorts through the rock record from just after the Permian-Triassic extinction, Fraiser also has unearthed evidence that explains why it took so long for life to recover. The answer appears to be more of the same: C02 levels remained high long after the initial die-off.

“After other extinction events on Earth, life bounced back within 100,000 to a million years,” she says. “But with the Permian-Triassic extinction, we don’t see a recovery for 5 million years. There is very low ecological complexity and diversity for all of that time.”

Another intriguing aspect of this interval in Earth’s history, says Fraiser, is that, according to the rock record from the Triassic, it was bounded by two C02 events.

The first was the disappearance of coral reefs. “That gap sounded the alarm,” she says. “That’s what indicated that C02 levels were elevated.”

On the back end, large communities of bivalves prevailed in such large numbers that they formed their own reefs.

Fraiser’s charting of the C02 “domino effect” on Early Triassic marine life is valuable as scientists study climate change today, says UWM Geology Professor John Isbell.

“The Earth’s system doesn’t care where the C02 comes from,” Isbell says. “It’s going to respond the same way.”

From Site: http://www.eurekalert.org/

 

Categorias: climate · enviromental education · global warming · ocean · pollution

Time Atlas to reflect enviromental disasters

Setembro 5, 2007 · Deixe um comentário

  • 16:43 03 September 2007
  • NewScientist.com news service
  • Catherine Brahic

Satellite photos show the how Lake Chad has shrunk over the decades (Image: UNEP) 

Cartographers have had to change their maps of Lake Chad to account for its shrinking shoreline (Image: <I>Times Comprehensive Atlas of the World</I>) 

See a gallery of images depicting the changing planet.

Climate change and unregulated irrigation projects are becoming major drivers for redrawing maps, say the cartographers of a renowned atlas.

“We can literally see environmental disasters unfolding before our eyes,” says Mick Ashworth, the editor-in-chief of The Times Comprehensive Atlas of the World. “We have a real fear that, in the near future, famous geographical features will disappear forever.”

The latest edition of the atlas is published on 3 September, four years after the previous version.

The atlas’s cartographers have had to make changes to their maps because of environmental changes in the past, but “there were even more of these cases in this edition,” says Jethro Lennox, publishing editor. “Rather than just one or two, you have half a dozen major examples of how human activities are causing changes in our maps.”

Features that have changed over the past few decades include:

• the Aral Sea in Central Asia has shrunk by 75% since 1967 mostly because of uncontrolled irrigation

• Lake Chad in Africa has shrunk by 95% since 1963 because of a combination of failing monsoons and human overexploitation

• the Dead Sea is 25 metres lower than it was 50 years ago – like the Aral Sea, the shrinking is largely due to uncontrolled irrigation

Marsh expansion

One feature that has changed for the better is the outline of the Mesopotamian marshlands. More than 90% of the area was destroyed in the 1990s by the diversion of water for agricultural irrigation and deliberate draining ordered by Saddam Hussein in retaliation for the Marsh Arabs’ uprising after the first Gulf War.

But since the end of Hussein’s regime in 2003, Marsh Arabs have returned to the area and are successfully restoring the marshlands. “Now we are having to make them bigger again,” Lennox told New Scientist.

For future editions, the cartographers are preparing for imminent changes. Shishmaref is an Inupiat village built on the permafrost of Alaska. It lies on a narrow island along the Bering Strait, where the melting of the permafrost and rising sea-levels threaten the very land it stands on.

As a result, some scientists believe that the 4000-year-old settlement is likely to become the first US community to have to move due to a warming climate.

Lennox says that he and his team are keeping an eye on the community in anticipation that they may have to change their future maps of the area.

Climate Change – Want to know more about global warming: the science, impacts and political debate? Visit our continually updated special report.

Source: http://environment.newscientist.com/article/dn12580-times-atlas-to-reflect-environmental-disasters.html

Categorias: climate · global warming · pollution · water

How to clean up the slums – cook on garbage

Agosto 31, 2007 · Deixe um comentário

By Barry Moody

NAIROBI (Reuters) – Entering Nairobi’s fetid slums the senses are first assaulted by a gagging stench and the sight of garbage everywhere, some even hanging from trees or smoldering in acrid fires.

The city government does not recognize the “informal settlements” where more than 60 percent of the population live, so no services are provided and no garbage collected.

The result is frighteningly unsanitary conditions.

Rubbish, “flying toilets” — excrement in plastic bags — and even aborted fetuses pile up in dumps along the muddy tracks or find their way into the rivers, where children play along the banks.

Garbage pollutes the air and seeps into ground water, or is picked over by pigs and other farm animals, its toxins entering the food chain and causing intestinal diseases.

Now a “community cooker” project in Africa’s biggest slum, Kibera, offers a way not only of getting rid of garbage, but of creating work for unemployed youths, and providing hot water and cooking facilities.

The people developing the project, a Nairobi architectural practice, the United Nations Environment Program (UNEP) and a Kenyan non-governmental organization, hope it can be a prototype for cookers all over Africa.

The cooker, dreamed up by Kenyan architect Jim Archer, has taken eight years to develop and is still overcoming design problems.

“My thinking was how do we get rid of the rubbish and … how can we induce people to pick it up. Then I thought, well if we can convert it to heat on which people can cook…”

Industrial incinerators from Europe would cost $50 million. “This was way out of the realms of reality … and it wouldn’t give anything back,” Archer said.

He set out to design and find financing for a simple, labor intensive device with a minimum of moving parts that would be easy to repair and require no imported technology.

Archer consulted engineering companies in Britain.

“They just couldn’t understand simplicity. They could computer control it. They could mechanically handle the rubbish. But we want this to be labor intensive because there are so many people with no jobs.”

FIREBOX FRANCIS

Then Archer found brass foundry worker Francis Gwehonah, nicknamed “Firebox” because of his remarkable self-taught skill at furnace building.

“It is a talent in me. I haven’t gone through any kind of training,” says Gwehonah.

First attempts to burn the rubbish produced choking smoke and soot that brought complaints from Kibera residents that the cooker caused more pollution than it eliminated.

By trial and error Gwehonah found that if he superheated a steel plate in the cooker he could ignite discarded sump oil, another pollutant.

By vaporizing droplets of water to split off the oxygen and mixing it with the burning oil, he has pushed up the temperature to more than 600 degrees centigrade and is working to get it even higher to destroy all the toxins in the smoke. 

The scheme, run by a community group in Kibera’s Laini Saba area, where 50,000 people live, has more benefits than burning garbage.

Local youth workers who go door to door collecting rubbish — for which they are paid a small fee by slum dwellers — can exchange it for cooking time or hot washing water.

John Githinji, from the 40-strong youth group that collects the rubbish, stoked the furnace with sweat pouring from his face. “People throw rubbish on the ground and it causes sickness,” he grunted through the smoke.

Water will also be boiled for drinking and eventually the cooker will be used for baking bread and cakes to sell.

“The trash has started to help us a bit after the cooker came. There are less diseases like diarrhea and the environment has improved. … I think burning the rubbish will bring good health to this community,” said Patricia Ndunge as she fried onions on the cooker.

About 60 percent of the slum rubbish can be burned if the temperature is high enough. Much of the rest can be sold to recycling companies.

The project, funded by Archer and his business partner, UNEP and a local paints company, has cost around $150,000 to develop, but once the prototype is perfected, future cookers should cost less than $10,000.

Kenya’s big supermarket chain Nakumatt has pledged to fund at least 20 more slum cookers and Archer believes they can eventually be adapted to distil dirty water, fire pottery kilns and operate scrap metal foundries.

“Most people dump in rivers and roadsides, on top of roofs, or on railway sidings. Finally there is somewhere we can take our waste, ” said Celine Achieng of the Umande Trust NGO working in Kibera, where more than 800,000 people live.

“This will solve a lot of problems. We are trying to change perceptions to persuade people not to take their waste to the river.”

Source: http://www.reuters.com/article/environmentNews/idUSL3076674020070830?feedType=RSS&feedName=environmentNews&pageNumber=1

Categorias: life style · pollution · projects · recycling