`Bangalore among world`s top polluted megacities`
Jerusalem: India`s `silicon valley` Bangalore has been rated among top polluted megacities in the world, claims a new study, using data collected by NASA`s high-tech satellites.
Scientists at Tel Aviv University tracked pollution trends for 189 megacities, including Mumbai, New York City and Tokyo, by analysing eight years` worth of data from three of NASA`s high-tech aerosol monitoring satellites.
Northeast China, India, the Middle East, and Central Africa are currently leading in pollution increase, including Bangalore, with a 34 per cent average increase in aerosol concentration between 2002 and 2010, website Tel Aviv University`s American Friends (AFTAU) reported.
Europe and Northeast and Central North America are seeing the largest decreases in aerosol concentrations overall, the website said.
Among the cleanest cities were Houston, with a 31 per cent decrease over the time period; Curitiba, Brazil, with a 26 per cent decrease; and Stockholm, Sweden, with a 23 per cent decrease.
Researchers led by Pinhas Alpert of Tel Aviv University`s Department of Geophysics and Planetary Sciences tracked pollution trends for 189 megacities ? metropolitan hotspots where the population exceeds 2 million.
Their method, published in the American Journal of Climate Change, is the first to provide standardised global testing of pollution levels.
Researchers found that the thickest layers of global smog, caused by traffic, industry, and natural minerals, among other factors, are found over the world`s megacities.
Some American cities were on the list of increased pollution levels, including Portland with a 53 per cent average increase and Seattle with a 32 per cent average increase, but
Alpert believes these numbers reflect the multiple wildfires that have been happening in the region in the second half of the period examined.
In the future, he hopes to develop a method for separating such natural causes of pollution from man-made pollutants for more accurate data.
However, getting an accurate measurement of pollution is no easy task. On-the-ground monitoring stations do not always provide the most accurate picture; monitoring stations depend heavily on local positioning and some cities put stations in urban centers, while others build on the edge of a city.
More from India
More from World
More from Sports
More from Entertaiment
- UP: Jammu-bound Muri Express derails in Kaushambi
- Five unmanned parachute-like objects spotted over Mumbai airport
- CBSE Board Class 12th Exam Results 2015 declared
- Delhi's 2015 CBSE Class 12 topper M Gayatri talks to Zee Media
- Jaipur girl Mini Rajpal wins Miss India Deaf 2015!
- Dawood's intercepted phone calls prove yet again he is in Pakistan
- Mumbai architecture creates double decker bus from scrap!
- No respite from heat for next three days: IMD
- Watch: Mumbai cops find new secret agents in housewives!
- One year of Modi govt: PM addresses mega rally in Mathura
- DNA: Sikh man in New Zealand removed his turban to help injured kid
- One year of Modi govt: PM promises to fulfil aspirations
- Police registers case after parachute-like objects were spotted over Mumbai airport
- Growing medical negligence in Delhi's AIIMS
- Hundreds die as heat wave continues in India
- Heatwave claims over 550 lives so far, Delhi saw hottest day
- Cbse.nic.in & cbseresults.nic.in Class 12th XII Results 2015: CBSE Board Class 12th XII Exam Results 2015 declared
- LIVE - Cbse.nic.in & cbseresults.nic.in Class 12th XII Results 2015: CBSE Board Class 12th XII Exam Results 2015 to be announced shortly
- Check cbseresults.nic.in for CBSE Class 12 result 2015
- Check WBBSE (wbresults.nic.in) Class 12th Results: West Bengal Board (wbscvet.org) Higher Secondary Class XII Vocational Results to be declared today at 4 PM
- Two dead, over 100 injured as Muri Express derails in UP; Prabhu announces Rs 2 lakhs ex-gratia for kin of dead
- PM Narendra Modi's Mathura rally: As it happened
- CBSE Class 12 results out: Here's how you can check
- Public rally on 100 days of AAP govt: As it happened
- Arvind Kejriwal's Aam Aadmi Party changes its logo
- One year of NDA govt: PM Modi writes open letter to nation, promises to transform India
- Unidentified flying objects spotted over Mumbai airport not motorised: Home Department
- World optimistic about India: PM Narendra Modi on 1 year of NDA govt
- Militants kill five, target telecoms in Kashmir attacks
- Bharatiya Janata Party lacks majority for Ram Temple, Article 370: Amit Shah