Wednesday, May 19, 2010

URANYUM OLMASA NE OLURDU?

Hepimizin bildiği gibi, yeni moda nedense enerjiyi uranyumdan elde etmekten geçiyor, yani nükleer santrallerden. Peki nedir bu uranyum,nasıl bir matafdır ki insanların tepkisine yol açmaktadır.Uranyumun böbrek, beyin, ciğer, kalp gibi organlara zararlı etkileri vardır. Zayıf bir radyoaktif madde olmasının yanı sıra zehirli bir metaldir.Uranyum aynı zamanda zehir üreten bir maddedir.Uranyum, doğada bulunduğu haliyle zincirleme çekirdek tepkimesine giremez. Bu nedenle atom silahları ve atom enerjisi santrallerinde yakıt olarak kullanılan uranyumun içindeki radyoaktif izotopların oranının arttırılması gerekir. Uranyum zenginleştirmesi denilen bu süreç sonucunda radyoaktif izotoplarca zengin yakıt oluştuğu gibi radyoaktif izotoplarını kaybetmiş zayıflatılmış uranyum da oluşur.

Buraya kadar uranyumun zararları ve tehlikeli olduğu gerçeğini göz ardı edersek, herhangi bir sorun varmış gibi görünmüyor. Çok az miktarlarda uranyum kullanılarak çok büyük miktarlarda enerji elde edilebilinir. Fakat uranyumun çıkardığı radyasyondan dolayı ancak özel binalarda ve kurşun mezarlarda saklanabilir ve uzun zaman radyasyon yaymaya devam eder. 

Bunların hepsini engellemek adına, yeşil enerji üretmek neden bizim tercihimiz olmasın? Yıllardır emperyalizme verilen savaş karşısında neden kendi sağlığımızı uranyum için pazarlık meselesi haline getirelim? Yeşil enerji diyorum: hayal edin ki bizde rüzgardan enerji elde edebiliyoruz. Çok da uzaklara bakıp hayal etmemize gerek yok. Çünkü istediğimiz sistem bugün başta Almanya olmak üzere birçok Avrupa Ülkesi  tarafından yoğunlukla kullanılan ve hiçbir tehlikesi olmayan bir sistemdir.Rüzgar enerjisinin faydalarını şöyle açıklayabiliriz:

  • Atmosferi kirletici etkiye sahip gazların salınmaması,
  • Temiz bir enerji kaynağı olması,
  • Kaynağının tükenmemesi (güneş, dünya ve atmosfer olduğu sürece),
  • Rüzgâr tesislerinin kurulumu ve işletilmesinin diğer tesislere göre daha kolay olması,
  • Enerji üretim maliyetlerinin düşük olması,
  • Güvenilirliğinin artması,
  • Bölgesel olması ve dolayısıyla kişilerin kendi elektriğini üretebilmesi.


Uranyumun önümüzdeki 50 yıldan sonra kaynaklarının tükeneceğini biliyor muydunuz? Peki neden kaynağı tükenmek üzere olan bir kaynaktan enerji elde etmeyi tercih ediyoruz? Nükleer enerji santrali kurulan bir bölgede radyasyonun etkisini yetiştirdiğimiz sebze ve meyvelerde çok net görürüz. Fakat rüzgar türbinleri kurulan bir bölgenin çok yakınında ekilip biçilen bir tarladan çıkan ürünleri gönül rahatlığıyla yiyebiliriz. Bundan dolayı da diyorum ki, memleketimize sahip çıkalım, artık gözümüzü açalım ve görelim gerçekleri.


Saturday, January 9, 2010

Dive into the depths of darkness in an elevator

Dive into the depths of darkness in an elevator

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Dive into the depths of darkness in an elevator

Dive into the depths of darkness in an elevator

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Friday, November 13, 2009

Plastic-hardening chemical makes men soft


Regular contact with high levels of bisphenol A (BPA), a compound commonly found in plastic food and drink containers, appears to cause erectile dysfunction and other sexual performance problems in men.

The finding, reported in the Washington Post, is likely to add fuel to the controversy over whether exposure to normal lower levels is harmful to humans and encourage campaigners calling for an outright ban.

According to the new study, male workers in four Chinese factories making BPA or using it reported an average fourfold increase in erectile dysfunction, a sevenfold increase in ejaculation difficulty and a fourfold decrease in sexual drive when compared to controls.

BPA is found in thousands of everyday products, such as the plastic lining of drinks cans. It is used in hard plastic bottles including some baby bottles, although some manufacturers voluntarily removed it from baby bottles sold in the US earlier this year.

More than 93 per cent of Americans have traces of the chemical in their urine and various studies have shown BPA can cause harm to animal reproductive systems, from early sexual maturity to low sperm count. The compound behaves like the hormone oestrogen, and is thought to disrupt hormonal processes.

However animals metabolise the compound more slowly than humans and the evidence base has been interpreted differently by different public health bodies.

Last August the US Food and Drug Administration (FDA) released a draft report stating it was safe at the typical exposure levels from food and drink packaging.

This was contradicted by the National Toxicology Program, which advises the FDA, and by the FDA's own Science Board. The administration is currently undertaking a new review.

The research is the first to show regular exposure to high levels of BPA in the workplace over long periods can have adverse effects on sexual function in men.

But how worried should we be? The levels of the chemical found in the urine of the Chinese workers in the study were around 50 times higher than normal.

Study leader De-Kun Li, a reproductive epidemiologist at US healthcare provider and insurer Kaiser Permanente's research institute in Oakland, California, acknowledged that his findings in BPA exposed workers could not be extrapolated to the general population.

Talk climate and money, not climate vs money, WWF tells APEC


Singapore – Leaders gathering in Singapore for the APEC summit this weekend must commit to strong and ambitious climate actions if they want to achieve sustainable growth for their region and help their countries to avoid disastrous consequences of global warming.

The Asia Pacific Economic Cooperation – bringing together world leaders like US President Barack Obama, Chinese President Hu Jintao and Japanese Prime Minister Yukio Hatoyama – must look beyond the group's usual areas of interest and focus on the common challenges posed by climate change.

"Solving problems of protectionism, trade zones, banks and exchange rates is very important, but what is all of this worth if the world slips into chaos because of devastating climate change?" said Kim Carstensen, Leader of the WWF Global Climate Initiative.

"APEC leaders must open their eyes and look into the real threats and challenges of this world and their region. We cannot talk about sustainable growth without solving the most intractable problem the planet is facing."

UN climate talks are floundering due to attempts by some governments to lower expectations for a new treaty and efforts to delay the deal.

The production of a legally binding framework at Copenhagen together with an amended Kyoto Protocol will help secure the survival of countries, cultures and ecosystems and clear the way towards a low carbon economy.

"If APEC countries would tackle the climate crisis with the same rigor they showed in protecting their economies from the financial meltdown, the world wouldn't have to worry about a lack of political will or insufficient levels of ambition in the UN climate talks", said Carstensen.

"We urge APEC leaders to bring economic recovery and climate recovery in sync, so that money spent on keeping growth levels high also helps bringing emission levels down."

In WWF's view, the Pacific region should become a model of technology cooperation, where developed APEC countries assist their developing country partners with adaptation and mitigation, through clean technologies, financial support and capacity building.

"Many want the APEC region to become a free trade zone, but they should also exploit its potential as a clean tech zone", said Carstensen.

"There is probably no better regional network of countries in the world for piloting smart concepts for technology cooperation like those discussed in the UN climate talks. To boost the international negotiations, we urgently need pioneers who show what's possible and how to make it happen."

Thursday, November 12, 2009

Push to Build Mosques Is Met With Resistance

COPENHAGEN — Paris has its grand mosque, on the Left Bank. So does Rome, the city of the pope. Yet despite a sizable Muslim population, this Danish city has nothing but the occasional tiny storefront Muslim place of worship.
The city, Denmark's capital, is now inching toward construction of not one, but two grand mosques. In August, the city council approved the construction of a Shiite Muslim mosque, replete with two 104-foot-tall minarets, in an industrial quarter on the site of a former factory. Plans are also afoot for a Sunni mosque. But it has been a long and complicated process, tangled up in local politics and the publication four years ago of cartoons mocking Islam.

The difficulties reflect the tortuous path Denmark has taken in dealing with its immigrants, most of whom are Muslim. Copenhagen in particular has been racked by gang wars, with shootouts and killings in recent months between groups of Hells Angels and immigrant bands.

The turmoil has fed the popularity of an anti-immigrant conservative party, the Danish People's Party. In city elections scheduled for Nov. 17, the People's Party, by some estimates, could double the roughly 6 percent of the vote it took in the last municipal election.

Denmark is not alone in grappling with the question. In Italy, the rightist Northern League opposes mosques in Italian cities; in Switzerland, voters will go to the polls on Nov. 29 in a referendum to decide whether to ban the construction of minarets.

In Denmark, it was the cartoons, one of which depicted Muhammad with a bomb in his turban, that gave the initial impetus to a movement for a mosque.

"I wrote a front-page story saying we somehow had to reconnect to the Muslims, to collect money to build a mosque as a sign of solidarity," said Herbert Pundik, 82, the former editor of the Danish daily Politiken. Mr. Pundik, speaking by phone from Tel Aviv, where he now lives, said that within 24 hours there had been more than 1,000 positive responses. But then the Muslim reaction to the cartoons turned violent, with attacks on Danish embassies in several cities, including Beirut and Damascus.

"The steam went out of the project," Mr. Pundik said.

Yet it did not die. Bijan Eskandani, the architect of the Shiite mosque, said he found inspiration for his design in the "Persian element in Islamic art," which he said consisted of a "special lyric, poetic attitude." The Shiite community, he said in written answers to questions, lacked the financial means to acquire a suitable site for a mosque. "The building lot they have is situated in an ugly, unattractive, inharmonious gray factory area," he said, adding that, "a sparkling mosque there may make a difference."

The very word Persian sends chills down Martin Henriksen's spine. "We are against the mosque," said Mr. Henriksen, 29, one of the People's Party's five-member directorate, in an interview in Copenhagen's Parliament building. "It's obvious to everyone that the Iranian regime has something to do with it," he said. "The Iranian regime is based on a fascist identity that we don't want to set foot in Denmark."

Since becoming party to the national government coalition in 2001, the People's Party has helped enact legislation to stem the flow of immigrants and raise the bar for obtaining citizenship. Immigrants, Mr. Henriksen insists, "need to show an ability and a will to become Danes." He cites past Jewish immigration as an example. "Many Jews have come to Denmark since the 16th century," he said. "We don't have discussions about whether to build synagogues." There are at least four synagogues in the city.

Abdul Wahid Pedersen, whose parents are Scandinavian, converted to Islam years ago. "I was 28, a child of the 60s," he said. Now 55, he is chairman of a 15-member committee promoting construction of a grand mosque for Copenhagen's Sunni Muslims.

He concedes that of the estimated 250,000 Muslims in a Danish population of 5.5 million, only about 35,000 are Sunnis. Yet he defends the need for a grand mosque and says that while the Sunni community is not soliciting financing from Saudi Arabia, as the People's Party contends, he has no problem accepting a donation. "If someone wants to chip in, that is O.K.," he said, in the shop in a working-class neighborhood where he sells Islamic literature, prayer rugs and other religious objects. "But they will have no influence on running the place." Mr. Pedersen said his committee was even considering installing wind turbines atop the minarets and covering the mosque's dome with one large solar panel.

The city's deputy mayor, Klaus Bondam, 45, defends the right of Muslims to their mosques. The minarets, he said, would be "quite slim towers, we're not going to be Damascus or Cairo." The city had also made clear there would be no calling to prayers from the mosques' minarets. As to the charge of foreign underwriting, Mr. Bondam said it did not concern him as long as the sources were listed openly.

But he said he feared that the debate over the mosques could help the People's Party double its share of the vote in this month's local elections to as much as 12 percent. "It's the little discomfit of people of other religion or background," he said. "Why can't they be like me?"

For Toger Seidenfaden, 52, the present editor of Politiken, the People's Party is "democratic and parliamentary — they are not brownshirts." But he said they were a "very Danish, nationalist party — they'd like Denmark before globalization."

On the broad avenue called Njalsgade, where the Sunni mosque is to be built on a vacant lot, Preben Anderson, 61, a bricklayer, said he had nothing against a mosque, though he pointedly said that he could not speak for his neighbors. "We have churches," he said. "We have to have mosques." He stood across the street from where weeds and junk now cover the lot where the Sunni mosque could one day stand. One neighborhood resident, asked if he could point out the site where the mosque would be built, professed not to know.

Yet, Per Nielsen, 56, a retired history teacher, said the economic slowdown and the gang wars in nearby neighborhoods were feeding the popularity of the People's Party. As for the mosque, he said, "There's very strong pressure — people living here don't want it."
 
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