PM 2.5

Smog may return on Monday: Met

New Delhi: Smog conditions over Delhi improved considerably on Thursday as the muchawaited wind finally picked up in and around the city. However, Met officials have warned of smoggier weather on Diwali as a second spell of low visibility is expected to set in by Monday. As surface wind touched …

Receptor model-based source apportionment of particulate pollution in Hyderabad, India

Air quality in Hyderabad, India, often exceeds the national ambient air quality standards, especially for particulate matter (PM), which, in 2010, averaged 82.2± 24.6, 96.2± 12.1, and 64.3± 21.2 μg/m3 of PM10, at commercial, industrial, and residential monitoring stations, respectively, exceeding the national ambient standard of 60 μg/m3. In 2005, …

CSE warns Delhi: Do not dismiss winter smog as an act of God

The dense smog which had been throttling Delhi for the past few days has lifted partially today, but it may come back with renewed vigour, as the factors causing it remain in force - warns Centre for Science and Environment (CSE). The dense smog which had been throttling Delhi for …

City enveloped in smog, back to pre-CNG levels

Gains Of Switch To Cleaner Fuel Frittered Away New Delhi: Delhi’s air pollution has reached alarming levels. For proof, just look out of the window. The grey-white ‘haze’ that has been covering the city since October 28, say experts, is actually smog that is linked to the rapid rise in …

Road transport in India 2010-30: emissions, pollution and health impacts

This study by Sarath Guttikunda and Puja Jawahar focuses on the energy and emissions outlook for the transport sector in India which could effectively result in a co-benefits framework for better air quality management in the cities & national climate policy dialogue. This study focuses on the energy and emissions …

Environmental pollution sources and their apportionment to ambient environment: A GIS-based study of Solan District

The Himachal Pradesh State Pollution Control Board (HPSPCB) has sponsored a study to IIT Kanpur (IITK) for Solan district that will cover environmental pollution sources inventory (air, water and hazardous waste), dispersion of pollutants, drainage of wastewater discharges and fate of pollutants, apportionment of pollution sources in ambient environment and …

Better use of air quality reports urged

Despite marked improvement of the transparency of China's air quality data over the past year, academics and NGOs suggest the government can make better use of real-time air pollution reports. According to a survey on Chinese cities' air quality transparency - which was conducted by the Institute of Public and …

China strives to meet air quality standard

China has been racing to meet the objectives set in its revised air quality standards, including promoting the use of an index for PM2.5, or fine particulate matter 2.5 microns or less in diameter. A total of 138 monitoring stations in 74 cities across the country have begun publishing data …

High concentration of PM 2.5 in Beijing's air

The average concentration of PM 2.5 in Beijing's air over the past 24 hours has exceeded the limits for "air with acceptable quality", as defined by the Ministry of Environmental Protection's air quality standards. PM 2.5 refers to particles in the air with less than 2.5 micrometers in diameter, which …

Beijing to finish PM2.5 network by end of Sept

Beijing plans to finish building its PM2.5 monitor network across the city by the end of September, according to the official website of Beijing Municipal Environmental Protection Bureau. PM2.5 refers to particulate matter with a diameter of 2.5 micrometers or less. These air pollutant particles can invade even the smallest …

IIT Kanpur to study Delhi’s air quality

New Delhi:Delhi government’s environment department is set to commission IIT Kanpur to study its problem of air pollution. The government has already devised a master plan to deal with the issue and its implementation should start by next year. “The master plan is quite comprehensive but we still felt the …

Particles size distribution of aerosols and associated metals, and source estimation in Delhi, India

Human exposure to particulate matter (PM) was determined in Urban Environment of Delhi, India. Samples were collected using eight stages impactor (Marple Cascade Impactor) at five sites during August to October 2011. Three samples were collected from each site; samples were analyzed in eight size ranges gravimetrically and chemically (for …

Public may have more say in environmental affairs

China's national lawmakers are debating to what extent the public should be allowed to participate in, and how much negotiating power the public should have, in environmental issues set by the government. With increasing numbers of protests against controversial government projects in China, members of the National People's Congress (NPC) …

World Wide Air Pollution in the Future

What is the world wide trend in air pollution? On the surface North America and Europe have been gradually improving. However, that is due to often moving industry to other countries such as China or India where air pollution is a bit more of a problem. Most of the world's …

Olympic athletes could be impaired by London pollution, experts warn

Olympic runners, cyclists, swimmers and even sailors arriving in London on Monday could be taken ill or see their performances impaired by air pollution, health experts have warned. According to Keith Prowse, respiratory consultant and medical adviser to the British Lung Foundation, a summer smog like any of the five …

Shanghai begins posting PM2.5 readings from 10 stations

Shanghai started to post readings of PM2.5 to the public from 10 monitoring stations around the city on Wednesday. PM2.5 stands for particulate matter with a diameter of 2.5 micrometers or less. These air pollutant particles can invade even the smallest airways. In the past, readings from only two control …

US consulate's release of PM2.5 data 'illegal'

Authorities with Shanghai's environmental protection bureau said on Friday afternoon that it's illegal for the US consulate in Shanghai to publish assessments of air quality to the general public. Zhang Quan, director of the Shanghai Environmental Protection Bureau, said at a media conference that the consulate cannot legally reveal data …

Health effects of black carbon

This report presents the results of a systematic review of evidence of the health effects of black carbon (BC). Short-term epidemiological studies provide sufficient evidence of an association of daily variations in BC concentrations with short-term changes in health (all-cause and cardiovascular mortality, and cardiopulmonary hospital admissions). Cohort studies provide …

Assessment of ambient air quality of Lucknow city during pre-monsoon, 2012

The study was carried out during the months of March-May, 2012 to see the status of air quality by monitoring and assessment of some selected air pollutants namely Respirable Particulate Matter (RSPM or PM10), Fine Particulates (PM2.5), Sulphur dioxide(SO2), Nitrogen dioxide (NO2), and Trace metals- Iron (Fe ), Nickel (Ni), …

Risk of nonaccidental and cardiovascular mortality in relation to long-term exposure to low concentrations of fine particulate matter: A Canadian national-level cohort study

Few cohort studies have evaluated the risk of mortality associated with long-term exposure to fine particulate matter [≤ 2.5 μm in aerodynamic diameter (PM2.5)]. This is the first national-level cohort study to investigate these risks in Canada. The authors investigated the association between long-term exposure to ambient PM2.5 and cardiovascular …

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