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Showing posts from November, 2017

Netaji Subhas Chandra Bose Papers declassified

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There has been a long discussion about the alleged death of Netaji Subhas Chandra Bose from the time he was announced dead in a broadcast by a Japanese news agency from Tokyo on 23 rd august, 1945.  After much public outcry and repeated demands for the declassification of documents by Netaji's family members, the Government of India decided to declassify the files relating to Netaji Subhas Chandra Bose and make them accessible to the public. Prime Minister Narendra Modi on 23 January 2016 released 200 digital copies of declassified documents on Netaji Subhas Chandra Bose at the National Archives of India in the public domain. The national archive of India subsequently released digital copies of these declassified files on 23 January, 29 March, 27 April, and 27 May. There are two sides to this story, one says that Netaji died on the Taihoku air-field in Taiwan on 18 th August 1945 when he was escaping for Russia,  other states that it was the plan of Bose himself to an

Why there is sudden rise in pollution in Delhi: Temperature inversion ?

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Everybody is aware of the ' Kadwi Hawa ' of Delhi but what makes the air pollution situation in Delhi worse? We all know that industrial emissions, vehicle exhaust, construction activity, etc, are the biggest contributors to pollution in Delhi throughout the whole year, but the situation specifically gets worse during winter months. What aggravates the already bad situation? Major contributing factors to Delhi's pollution are: Inversion: Usually the temperature in the atmosphere decreases with height, hence warmer air close to the earth's surface moves upwards and the air does not get stagnant. However, during inversion cold air gets trapped close to the surface overlain by a layer of warm air. This phenomenon cap the movement of air. Wind pattern: In winter 72 % of the wind blows into Delhi from the northwestern part of India and Pakistan, these winds are not too strong during the monsoon season. This wind brings particulate matter along with it. Stub

Delhi pollution: What is AQI ?

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Delhi residents can experience a  sudden increase in pollution levels  during winter, visible as a dense smog layer over the city, resulting in breathing problems and itching in the eyes as immediate consequences and many other health conditions in the long term. Air quality, one of the essential components of Sustainable Development Goals, is deteriorating owing to population increase and rapid economic growth.  To execute policy measures against this deterioration, the government needed a scientific framework, which necessitated the formation of a National Air Quality Index (AQI).   The main objective of the index, as explained by Central Pollution Control Board, is  “to adopt/develop an Air Quality Index (AQI) based on national air quality standards, health impacts and monitoring program which represent perceivable air quality for the general public in easy to understand terms and assist in data interpretation and decision-making processes related to pollution mitigation measures