PM 2.5

Beijing moves to curb prolonged haze pollution

Choked in dense smog for three consecutive days, Beijing started emergency response measures on Sunday to curb the air pollution at hazardous levels. Monitoring data showed the Air Quality Index in most parts of the capital reached 500, the maximum pollution level, on Sunday, the third hazy, grey day. Beijing …

Chinese media urges action on air pollution

Chinese media said on Monday the government had to take urgent action to tackle air pollution, which has blanketed parts of the country at dangerous levels in recent days, and one newspaper called for a re-think of a "fixation" on economic growth. China's media are under tight Communist Party control …

Pollution "worst on record" in Beijing: Greenpeace

Air quality in Beijing was the "worst on record" on Saturday and Sunday, according to environmentalists, as the city's pollution monitoring centre warned residents to stay indoors with pollution 30-45 times above recommended safety levels. The Chinese capital, home to around 20 million people, has been wrapped in thick smog …

Estimation of citywide air pollution in Beijing

There has been discrepancies between the daily air quality reports of the Beijing municipal government, observations recorded at the U.S. Embassy in Beijing, and Beijing residents’ perceptions of air quality. This study estimates Beijing’s daily area PM2.5 mass concentration by means of a novel technique SPA (Single Point Areal Estimation) …

China expands pollution monitoring to biggest cities

China plans to release hourly air pollution monitoring data in 74 of its biggest cities starting on New Year's Day, state media said on Sunday, in a sign of increasing responsiveness to quality-of-life concerns among prosperous urban people. Choking pollution and murky grey skies in Chinese cities is a top …

Size distribution and seasonal variation of size-segregated particulate matter in the ambient air of Raipur city, India

In this study, size-segregated particulate matter samples were collected in Raipur, India from July 2009 to June 2010 by using eight-stage cascade impactor sampler. The annual average concentrations and associated standard deviation of PM10, PM2.5–10, PM2.5, and PM1 were 270.5 ± 105.5, 119.6 ± 44.6, 150.9 ± 78.6, and 72.5 …

Understanding the health effects of ambient ultrafine particles

A new report from the Health Effects Institute (HEI), "Understanding the Health Effects of Ambient Ultrafine Particles" concludes that while there have been a growing number of laboratory and field studies of the effects of ultrafine particles (UFPs), “toxicologic studies in animals, controlled human exposure studies, and epidemiologic studies to …

China to release real-time air quality data

The government will issue real-time air quality monitoring data in 74 cities starting Ja 1, 2013, the Ministry of Environmental Protection said Friday. The data will include PM2.5, a gauge that monitors fine particles with a diameter of 2.5 microns or less, the ministry said. Information on major pollutants in …

Tiny air pollutants kill thousands, cost billions in China

Microscopic pollutant particles in the air have killed some 8,600 people prematurely this year and cost $1 billion in economic losses in four Chinese cities, according to a study by Beijing University and Greenpeace. The study of pollutant levels of PM2.5, or particles smaller than 2.5 micrometres in diameter, in …

China pledges $56 billion to cut air pollution

China will spend 350 billion yuan ($56 billion) by 2015 to curb air pollution in major cities, the environmental watchdog said on Wednesday. Local governments will fund most of the programmes aimed at cutting the level of harmful particles in the air in 117 cities by at least 5 per …

Costs and benefits of cleaner fuels and vehicles in India

Investing in ultra-low-sulfur fuel (ULSF, fuels with less than 10 ppm sulfur content) and clean vehicle technologies in India will not come without costs. But the benefits of these investments, in terms of reduced healthcare costs and higher productivity, far outweigh the costs. This paper discusses these issues in detail.

Dangerous breathing: PM2.5 - measuring the human health and economic impacts on China's largest cities

This is a summary of a report that studies the health risks and economic loss linked to PM2.5 in four major Chinese cities, and assesses the potential public health and economic benefits given effective improvement of PM2.5 pollution control under different scenarios. It is the first of its kind, based …

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 …

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