Dear Friends,
Living in a megacity isn’t easy, it’s rather very challenging. And one of the challenges to deal with is the increasing level of pollution in these cities caused by traffic, industry and natural minerals. A study reported that India’s hub for IT sector, Bangalore, is one among the top polluted megacities in the world.
189 megacities were tracked for pollution by the scientists at Tel Aviv University. The study revealed that cities with population that exceeds 2 million were the hotspots for high pollution. Out of these 58 megacities Mumbai, Tokyo and New York also showed the population that amounts over 5 million. The study was put together by collaborating eight years of data collected from three of NASA’s high tech aerosol monitoring satellites.
India, Northeast China, the Middle East and Central African cities are the foremost showing increase in pollution rates including Bangalore, with a 34 percent average rise in aerosol concentration from 2002 to 2010, reported by Tel Aviv University's American Friends (AFTAU) website.
The smog that often covers megacities is in fact a thick cloudy layer several hundred meters over the Earth’s surface, which contains the particle of pollutants.
For those who live below these thick layers and breathe in the particulates, can suffer severe health risk and it is also an environmental hazard.
The countries which have showed a large decrease in aerosol concentration overall are Europe, and Northeast and Central North America.
The cities which have the most fresh and clean environment are Houston which showed 31 percent decrease; Curitiba in Brazil with 26 percent decrease; and Stockholm, capital of Sweden with decrease of 23 percent in pollution.
Prof. Pinhas Alpert led the research of Tel Aviv University's Department of Geophysics and Planetary Sciences to prepare this study. The method applied by the research team is the first of its kind, in preparing the standardaised global testing of pollution levels. It was published in the American Journal of Climate Change.
There are some American cities with increased in level of pollution. It includes Portland with an average 53 percent rise and Seattle with an average increase of 32 percent. This increase has been correlated to the multiple wildfires that have occurred in these regions during the second half of the examined time period.
Apart from unveiling reliable data about the pollution trends in the world, Prof. Alpert speculates that this method of monitoring can also bring out the countries responsible for their emissions and which will make them incorporate more environmental friendly practices.
The research team is working on developing methods to separate the pollution caused by natural destructions from the ones caused by humans for more accurate data.
Prof Alpert told that recording accurate measurement of pollution is not easy job. The monitoring stations on the ground don’t always provide the most precise picture. The location of the monitoring stations play an important role in this, where some cities position their stations in urban centers whereas others construct it on city borders, which leads to a discrepancy of collected records.
The other reason that makes it difficult to analyze pollution is the standardized approach to smog; also the unreliable data received from the monitoring station does create commotion.
However the aim of international treaties to reduce pollution could rely on the current method of measuring pollution. Prof Alpert suggested that the cities which have successfully shown decrease in the pollution levels should be seen as an example to follow.
Source :SiliconIndia
From India, New Delhi
1137Living in a megacity isn’t easy, it’s rather very challenging. And one of the challenges to deal with is the increasing level of pollution in these cities caused by traffic, industry and natural minerals. A study reported that India’s hub for IT sector, Bangalore, is one among the top polluted megacities in the world.
189 megacities were tracked for pollution by the scientists at Tel Aviv University. The study revealed that cities with population that exceeds 2 million were the hotspots for high pollution. Out of these 58 megacities Mumbai, Tokyo and New York also showed the population that amounts over 5 million. The study was put together by collaborating eight years of data collected from three of NASA’s high tech aerosol monitoring satellites.
India, Northeast China, the Middle East and Central African cities are the foremost showing increase in pollution rates including Bangalore, with a 34 percent average rise in aerosol concentration from 2002 to 2010, reported by Tel Aviv University's American Friends (AFTAU) website.
The smog that often covers megacities is in fact a thick cloudy layer several hundred meters over the Earth’s surface, which contains the particle of pollutants.
For those who live below these thick layers and breathe in the particulates, can suffer severe health risk and it is also an environmental hazard.
The countries which have showed a large decrease in aerosol concentration overall are Europe, and Northeast and Central North America.
The cities which have the most fresh and clean environment are Houston which showed 31 percent decrease; Curitiba in Brazil with 26 percent decrease; and Stockholm, capital of Sweden with decrease of 23 percent in pollution.
Prof. Pinhas Alpert led the research of Tel Aviv University's Department of Geophysics and Planetary Sciences to prepare this study. The method applied by the research team is the first of its kind, in preparing the standardaised global testing of pollution levels. It was published in the American Journal of Climate Change.
There are some American cities with increased in level of pollution. It includes Portland with an average 53 percent rise and Seattle with an average increase of 32 percent. This increase has been correlated to the multiple wildfires that have occurred in these regions during the second half of the examined time period.
Apart from unveiling reliable data about the pollution trends in the world, Prof. Alpert speculates that this method of monitoring can also bring out the countries responsible for their emissions and which will make them incorporate more environmental friendly practices.
The research team is working on developing methods to separate the pollution caused by natural destructions from the ones caused by humans for more accurate data.
Prof Alpert told that recording accurate measurement of pollution is not easy job. The monitoring stations on the ground don’t always provide the most precise picture. The location of the monitoring stations play an important role in this, where some cities position their stations in urban centers whereas others construct it on city borders, which leads to a discrepancy of collected records.
The other reason that makes it difficult to analyze pollution is the standardized approach to smog; also the unreliable data received from the monitoring station does create commotion.
However the aim of international treaties to reduce pollution could rely on the current method of measuring pollution. Prof Alpert suggested that the cities which have successfully shown decrease in the pollution levels should be seen as an example to follow.
Source :SiliconIndia
From India, New Delhi
Hi Ramesh, Please do not copy entire articles from other websites. You can paste the first paragraph with a link to the original source. Regards, Sid
From India, Gurgaon
From India, Gurgaon
Hello Mr Bhardwaj Ramesh,
A very nice article.
It describes the problem in cities like Bangalore.
Other Indian cities, even though they have not been mentioned, may not be far behind.
The next question that comes to our mind is about the alleviation plan.
I remember New Delhi having a dubious distinction of being the
fourth largest polluted city in the World.
In one of the Seminars about Industrial Pollution in Delhi it was pointed that all the
Automobiles together belched out more pollutants right inside the city at ground level.
Whereas the Industrial gaseous emissions were let of through tall stacks
making a lesser impact on Ground Level Concentrations.
The administration authorities came out with stringent laws and Natural Gas successfully
replaced diesel and petrol to a large extent, bringing down the pollution levels.
It was an effective corrective action.
Likewise it will be educative to know what corrective actions are under consideration
say In New York, Tokyo, Bangalore and elsewhere.
Thanks for your post.
V.Raghunathan..................................... ........................... Navi Mumbai
From India
A very nice article.
It describes the problem in cities like Bangalore.
Other Indian cities, even though they have not been mentioned, may not be far behind.
The next question that comes to our mind is about the alleviation plan.
I remember New Delhi having a dubious distinction of being the
fourth largest polluted city in the World.
In one of the Seminars about Industrial Pollution in Delhi it was pointed that all the
Automobiles together belched out more pollutants right inside the city at ground level.
Whereas the Industrial gaseous emissions were let of through tall stacks
making a lesser impact on Ground Level Concentrations.
The administration authorities came out with stringent laws and Natural Gas successfully
replaced diesel and petrol to a large extent, bringing down the pollution levels.
It was an effective corrective action.
Likewise it will be educative to know what corrective actions are under consideration
say In New York, Tokyo, Bangalore and elsewhere.
Thanks for your post.
V.Raghunathan..................................... ........................... Navi Mumbai
From India
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