PM 2.5

Analysis says dust contributes the most to Tianjin's smog

An analysis of Tianjin's air pollutants has identified dust as the main component of the city's smog. Tianjin, about 100 kilometers southeast of Beijing, is the second city after the capital to release an analysis of its fine particulate matter, or PM2.5. The analysis, released over the weekend, comes after …

A systems approach to evaluating the air quality co-benefits of US carbon policies

Because human activities emit greenhouse gases (GHGs) and conventional air pollutants from common sources, policy designed to reduce GHGs can have co-benefits for air quality that may offset some or all of the near-term costs of GHG mitigation. We present a systems approach to quantify air quality co-benefits of US …

National ambient air quality status & trends – 2012

CPCB implements the National Ambient Air Quality Monitoring (NAMP) through a network comprising 544 operating ambient air quality stations covering 224 cities/towns in states and Union territories of the country in compliance with the mandate under the Air (Prevention and Control of Pollution) Act, 1981 to collect compile and disseminate …

National ambient air quality status & trends – 2011

CPCB implements the National Ambient Air Quality Monitoring (NAMP) through a network comprising 523 operating ambient air quality stations covering 215 cities/towns in states and Union territories of the country in compliance with the mandate under the Air (Prevention and Control of Pollution) Act, 1981 to collect compile and disseminate …

Beijing cuts coal use by 7 pct in H1 in anti-smog push

Aug 12 (Reuters) - China's capital Beijing cut total coal consumption by 7 percent in the first half of 2014 as part of its efforts to tackle smog, the official Xinhua news agency reported, citing data from its environmental protection bureau. Beijing is at the front line of a "war …

Cost-benefit analysis of Mexico’s heavy-duty emission standards (NOM 044)

Mexico is planning to revise its existing emissions standards for diesel heavy-duty vehicles (HDVs). The existing regulation, Norma Oficial Mexicana 044 (NOM 044), requires new vehicles to meet either U.S. Environmental Protection Agency (EPA) 2004 or Euro IV standards. Revisions to NOM 044 standards will require manufacturers of new heavy-duty …

Only 6 cities meet latest air quality standard

ONLY nine of 161 Chinese cities reached the new — and stricter — air quality monitoring standards in the first half of the year, according to the Ministry of Environmental Protection. The six were named as Zhoushan, Shenzhen, Zhuhai, Zhanjiang, Yunfu, Beihai, Sanya and Lhasa. In 2012, the government issued …

Merely 5% Chinese cities reach air quality standards

BEIJING -- Only nine of 161 Chinese cities reached the new -- and stricter -- air quality monitoring standards in the first half of this year, according to the Ministry of Environmental Protection (MEP). Zhoushan, Shenzhen, Zhuhai, Zhanjiang, Yunfu, Beihai, Sanya and Lhasa are the cities which reached the standard, …

Estimating the number of low-income Americans exposed to household air pollution from burning solid fuels

Exposure to household air pollution (HAP) from inefficient biomass and coal stoves kills nearly 4 million people every year worldwide. HAP is an environmental risk associated with poverty that affects an estimated 3 billion people mostly in low- and middle-income countries. The objective of the study was to estimate the …

Tree and forest effects on air quality and human health in the United States

Trees remove air pollution by the interception of particulate matter on plant surfaces and the absorption of gaseous pollutants through the leaf stomata. However, the magnitude and value of the effects of trees and forests on air quality and human health across the United States remains unknown. Computer simulations with …

Beijing shuts big coal-fired power plant to ease smog: Xinhua

Beijing has closed the first of four large coal-fired power plants set to be de-commissioned as part of the city's efforts to cut air pollution, official news agency Xinhua reported on Wednesday, citing the local planning agency. Xinhua said the authorities had shut down the Gaojing Thermal Power Plant's six …

Beijing shuts big coal-fired power plant to ease smog: Xinhua

Beijing has closed the first of four large coal-fired power plants set to be de-commissioned as part of the city's efforts to cut air pollution, official news agency Xinhua reported on Wednesday, citing the local planning agency. Xinhua said the authorities had shut down the Gaojing Thermal Power Plant's six …

China's air quality improves in H1

The air quality in 60.3 percent of days in the first half of the year met national standards, up 1.6 percent from the same period in 2013, the Ministry of Environmental Protection said on Monday. Major air pollutants, including PM2.5, PM10, sulfur dioxide and carbon monoxide, all dropped, according to …

PM2.5 average shows year-on-year decline

Beijing's average PM2.5 index of 91.6 micrograms per cubic meter in first half of 2014 represents an 11.2 percent year-on-year decrease, according to a city report. The level of PM2.5, airborne particles smaller than 2.5 microns in diameter that contribute to Beijing's notorious smog, is still far above the national …

Beijing promises to meet air quality standard by 2022

Now that Beijing has become one of three finalists in the race for the 2022 Winter Olympics, the city has once again reiterated its fight against air pollution. Fang Li, vice head of the Beijing Municipal Environmental Protection Bureau, said that Beijing has adopted legally binding regulations for reducing air …

Beijing to invest 50 billion yuan to tackle air pollution

The Chinese capital plans to invest 47.858 billion yuan ($7.662 billion) to combat air pollution in the next five years, with a special focus on coal-fired pollution, vehicle emissions, industrial pollution and dust. The funds were allocated by the Beijing Municipal Bureau of Finance to support the city's 2013-2017 programs …

Experts urge China to detail port emissions

China should establish emissions inventories for all major port cities as soon as possible to detail pollutants from ships and ports, experts have suggested. They say these pollutants may account for as much as 20 percent of the cities' airborne pollutants and have also called for the diesel fuel standard …

Beijing expects healthy air by 2030

The Chinese capital's fine-particulate pollutant intensity is expected to drop to the internationally recognized safe level in 16 years, environmental authorities said. Pan Tao, head of the Beijing Municipal Research Institute of Environmental Protection, said the concentration of PM2.5 - particulate matter with a diameter of 2.5 micrograms or less …

Controlled exposures to air pollutants and risk of cardiac arrhythmia

Epidemiological studies have reported associations between air pollution exposure and increases in cardiovascular morbidity and mortality. Exposure to air pollutants can influence cardiac autonomic tone and reduce heart rate variability, and may increase the risk of cardiac arrhythmias, particularly in susceptible patient groups.

Characterizing Patna’s ambient air quality and assessing opportunities for policy intervention

According to the latest World Health Organisation estimates on "Ambient (outdoor) air pollution in cities database 2014", Patna is the second most polluted city in the world, in terms of PM2.5 emissions. Additionally given the rapid development in Bihar and especially in the Patna region, this study analyses the sources …

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