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segunda-feira, 30 de novembro de 2015

ZIKA FEVER AND BIRTH DEFECTS IN NORTHEASTERN BRAZIL

Brazil links Zika fever to birth defects

http://www.bbc.co.uk/news/world-latin-america-34956646


The mosquito-borne virus from Africa has been linked to a spike in birth defects across the country. 
Pernambuco has around two thirds of the cases of micro-encephalitis - an inflammation of the foetal brain that can stunt growth of the baby's head.   
A World Health Organization team is due in Brazil this week.
On Saturday, the Brazilian health ministry said the link between Zika and birth defects was unprecedented anywhere in the world.  
It said it had recorded two adult deaths and 739 cases of micro-encephalitis.

domingo, 22 de novembro de 2015

THE MUD CONTAINS MERCURY, ARSENIC, CHROMIUM...ABOVE TOLERATED LEVELS...BUT THE BRAZILIAN-AUSTRALIAN ENTERPRISE SAY IT IS 'HARMLESS'

Reproduced from BBC News


The waste has travelled more than 500km (310 miles) since the dam at an iron mine collapsed two weeks ago.  
Samarco, the mine owner, has tried to protect plants and animals by building barriers along the banks of the river.
Workers have dredged the river mouth to help the mud flow out to sea fast.
The contaminated mud, tested by the water management authorities, was found to contain toxic substances like mercury, arsenic, chromium and manganese at levels exceeding human consumption levels. 

Samarco has insisted the sludge is harmless.

In an interview with the BBC, Andres Ruchi, director of the Marine Biology school in Santa Cruz in Espirito Santo state, said that mud could have a devastating impact on marine life when it reaches the sea. 
He said the area of sea near the mouth of the Rio Doce is a feeding ground and a breeding location for many species of marine life including the threatened leatherback turtle, dolphins and whales. 
"The flow of nutrients in the whole food chain in a third of the south-eastern region of Brazil and half of the Southern Atlantic will be compromised for a minimum of a 100 years," he said.

quarta-feira, 18 de novembro de 2015

23 MILLION CUBIC KM: NEW ESTIMATE OF TOTAL GROUND WATER IN OUR PLANET

The total amount of groundwater on the planet, held in rock and soil below our feet, is estimated to be 23 million cubic km.

As reported in BBC News
Published in 
Nature Geoscience
 
 
doi:10.1038/ngeo2590


If this volume is hard to visualise, imagine the Earth's entire land surface covered in a layer some 180m deep.
The new calculation comes from a Canadian-led team and is published in the journal Nature Geoscience.
Significantly, little of this water - just 6% - is the kind of bankable resource that is most useful to people.
That small fraction is referred to as "modern" groundwater: it is extractable because it is near the surface, and can be used to supplement above-ground resources in rivers and lakes.
"It's the groundwater that is the most quickly renewed - on the scale of human lifetimes," explained study leader Tom Gleeson from the University of Victoria.

"And yet this modern groundwater is also the most sensitive to climate change and to human contamination. So, it's a vital resource that we need to manage better."
Finite resource
To quantify just how much water is stored in the top 2km of the Earth's surface, Dr Gleeson's team had to combine large data sets with an element of modelling.
They included information on the permeability of rocks and soil, on their porosity, and all that is known about water table gradients, which tell you about inputs from precipitation.
Key to determining the age of all this stored water is a collection of thousands of tritium measurements.
Tritium is a radioactive form of hydrogen that spiked in the atmosphere 50 years ago as a result of thermonuclear bomb tests.
It can therefore be used as a tracer for all the rain that has made its way underground ever since.

The map above shows the distribution of this modern groundwater around the globe.
Dark blue shows where it is very quickly renewed. Light blue shows the older groundwater, which is mostly stagnant and non-renewable. 
"Old water is highly variable," Dr Gleeson told BBC News.
"Some places it is quite deep, in some places not. In many places, it can be poor quality. 
"It can be more saline even than ocean water and it can have lots of dissolved metals and other chemicals that would need to be treated before it could be used for drinking or agriculture."
This puts further emphasis on the modern reserves and the need to manage them in a sustainable way. The study underlines just how unevenly they are spread around the globe.
The next step, Dr Gleeson said, was to try to work out just how fast some water stores were being depleted.

Also writing in Nature Geoscience, Ying Fan, from Rutgers University, US, commented that "this global view of groundwater will, hopefully, raise awareness that our youngest groundwater resources - those that are the most sensitive to anthropogenic and natural environmental changes - are finite".

terça-feira, 17 de novembro de 2015

"VALE" + "BHP" = ENVIRONMENTAL TRAGEDY IN BRAZIL CAUSED BY THIS 'JOINT VENTURE'

Today, 17th November/2015, Brazilian media has informed that the mining enterprise will pay (initially) R$1 billion ("reais" = U$250 million) for damages they caused.
Brazilian experts estimate the costs as, at least, R14 billion ("reais"= U$3.5 billion)

It is important to say that about 400  million metric ton of iron are still in Minas Gerais state to be mined.

See below, as reported on The Guardian


As despair turns to anger over a deadly dam burst at a Brazilian mine, lawmakers pushed on Tuesday for tougher regulations in a new mining code, as iron ore giant Vale SA came under pressure to help mourning families and contain the environmental impact. 

In five days of rescue efforts in towns ravaged by the massive mudflow, six bodies have been found and 22 people are still missing, making it one of the worst mining disasters in Brazil’s history. Rescuers abandoned a search for seven-year-old Tiago Damasceno in the muddy aftermath of the dam collapse on Tuesday, as hope for survivors diminishes five days after the disaster.

The tragedy in the mineral-rich south-eastern state of Minas Gerais has displaced hundreds of residents, triggered investigations by prosecutors and spurred calls for stricter oversight of the mining industry, a huge provider of jobs and government tax receipts. No cause has been identified for the dams’ failure, which left about 750 people homeless.

The chief sponsor of a new mining code in congress, Leonardo Quintão, told Reuters on Tuesday that he planned to add measures to tighten regulation of tailings dams like the two that collapsed on Thursday. 

Minas Gerais’ governor, Fernando Pimentel, acknowledged state mining regulations are not enough and his aides said they may need to rethink their efforts to fast-track licensing. 

Public criticism fell first on mine operator Samarco, but the spotlight has turned to the big names behind the 50-50 joint venture: Australia-based BHP Billiton Ltd, the world’s largest mining company, and Brazilian partner Vale, the biggest iron ore miner.

“Samarco is just a name they made up. We need BHP and Vale to take responsibility for this tragedy,” said Duarte Junior, mayor of the town of Mariana, who has coordinated relief efforts. 
BHP’s public response has been rapid, but Vale, which accounted for more than 10% of Brazil’s total exports in 2013, has so far appeared aloof. 

BHP chief executive Andrew Mackenzie held a news conference in the hours following the disaster and the company announced he would travel to Brazil to survey the damage. It has also splashed almost daily updates on the tragedy in English and Portuguese across the top of its website.

By contrast, Vale released a five-sentence statement some 24 hours after the dams collapsed and referred questions to Samarco. Vale’s chief executive, Murilo Ferreira, made an unannounced visit to Mariana on Saturday, which the company revealed two days later. 

Mariana’s mayor has worked closely with Samarco, but he said on Monday that no senior executives from Vale or BHP Billiton had contacted him. 

Influential columnist Miriam Leitão excoriated the company on Tuesday for its “absolutely insufficient” response. 

“Vale has been drilling and dumping around Minas Gerais for 70 years,” Leitão wrote in the newspaper O Globo. “After a disaster of this scale, it can’t issue a laconic statement as if it weren’t obliged to act immediately.” 

She called on Ferreira to explain how Vale will compensate displaced families, contain the environmental damage and monitor the ongoing effects of the spill downstream.

Asked for a response, Vale representatives reiterated that Ferreira had met with Samarco executives and offered helicopters and other equipment for the rescue efforts.

Leitão also pilloried the federal government for leaving state authorities to sort out the environmental impact of the collapsed dams and 60m cubic meters of wastewater contaminating rivers and coastline more than 300 miles (500km) away. 

Biologists warn that the environmental impact may be permanent, devastating local fisheries and farms. 

The destruction reached as far as about 60 miles (100km) from the burst dams, with dozens of houses now little more than bare walls. Firefighters have managed to open one street in the worst-affected village of Bento Rodrigues, but for many there is no home to go back to.

Tourism and other industries are already suffering. Wood pulp maker Cenibra suspended operations at two production lines due to the mudflow threatening its water source. 

President Dilma Rousseff has not traveled to the disaster area, although she said in at a speech on Tuesday that she is “very worried” about the mud and waste from the burst dams making its way downstream. She said her government was ready to help state and local authorities. 

terça-feira, 3 de novembro de 2015

HOSTILE LOGGERS AND FARMERS WILL DESTROY INDIGENOUS RESERVES IN THE AMAZON...IF ...

Brazilian legislation with respect to such crimes makes Amazonian reserves liable to those disasters!

As reported on BBC News


Some 12,000 indigenous people live in the Arariboia reserve, in the state of Maranhao. 
Their leaders say the fires were started more than a month ago by hostile loggers and farmers who want exploit the area's natural resources. 
Hundreds of firefighters and soldiers had been trying to put out the blazes.
Their work has been helped by recent heavy rains, which extinguished 90% of the fires in the state, a local official told the AFP news agency.
An additional 10% of fires were under control, said Luciano Evaristo, regional director of the Brazilian Institute of Environment and Renewable Natural Resources (Ibama).
Loggers started the fires to intimidate the tribes and undermine their projects to boost surveillance programmes in the Arariboia reserve, said environmental group Greenpeace.
Some 12,000 ethnic Guajajara indigenous people live in the area.
Among them is a small vulnerable group of about 80 members of the Awa-Guaja tribe, who have chosen to live in isolation deep in the forest.
Brazilian environmental officials say there has been a record number of fires throughout the Amazon as the result of exceptionally dry weather. 
More than 13,000 forest fires have been recorded in the Brazilian Amazon since the beginning of the year.