Environmental epidemiological studies of the health effects of air pollution have been major contributors to the understanding of such effects. The chronic effects of atmospheric pollutants have been studied, but, except for the known respiratory effects of particulate matter (PM), they have not been studied conclusively. There are ongoing studies of the chronic effects of certain pollutant cla...

Based on the results of PM2.5 sources analysis, this paper analyzes component evolution, formation causes, and governance countermeasures urban haze in Beijing. The proportion coal burned Beijing has gradually declined, motor vehicle exhaust become largest source pollution. pollution is related to change energy structure, increase number vehicles, construction area, cross-regional transmission ...

HE TREND toward composting reached its peak in Switzerland in 1975 when approximately 10 percent-or over 200,000 tons-of garbage were composted. However, as garbage production per capita and per year increased ;gin 1960 to 430 kg in 1987, cheminination also accelerated. This led to concern about excessive pollutants in compost and their impact on human health and the environment. Switzerland's...

BACKGROUND With the rapid development of China's economy, air pollution has attracted public concern because of its harmful effects on health. METHODS The source apportioning of air pollution, the spatial distribution characteristics, and the relationship between atmospheric contamination, and the risk of exposure were explored. The in situ daily concentrations of the principal air pollutants...

Ambient air is polluted with a mixture of pulmonary toxicants. Previous studies indicate that prior exposure to atmospheric oxidant pollutants such as ozone may significantly alter the response to other pollutants, such as 1-nitronaphthalene (1-NN) . 1-NN, a component of the particulate exhaust from diesel engines, has been found at low concentrations in ambient air. Using a metabolomic approac...

This study aims to investigate the allergic disease (AD) prevalence for elementary school children in an industrial city of Ulsan and identify major environmental risk factors associated with AD prevalence. Data on the physician-diagnosed prevalence in the past 1 year and potential risk factors of AD (asthma, allergic rhinitis and atopic dermatitis) were collected by a questionnaire including I...

We conducted on-site studies in Kyoto City, Japan, to evaluate the effect of air pollution by automobile gas exhaust on leaf photosynthetic functions four urban roadside tree species. Nitrogen oxides (NO and NO2) are major pollutants that related exhaust. The species-specific response photosynthesis was obtained for single-year data, which at high sites, Rhododendron × pulchrum, Rhaphiolepis in...

A general proecological urban road traffic control idea for the street canyon is proposed with emphasis placed on development of advanced continuum field gasdynamical (hydrodynamical) control model of the street canyon. The continuum field model of optimal control of street canyon is studied. The mathematical physics' approach (Eu-lerian approach) to vehicular movement, to pollutants' emission,...

Polycyclic aromatics hydrocarbons are chemical species with two to six fused benzene rings and are well-known toxic hazardous pollutants and highly potent carcinogens that can cause tumors in some organisms.1 In recent years, naphthalene contamination in water systems has drawn increasing attention. Naphthalene originates from natural and anthropogenic sources. Anthropogenic sources include eng...