Qualitatively and quantitatively, we have demonstrated that airborne polychlorinated biphenyl (PCB) concentrations in the air surrounding New Bedford Harbor (NBH) are caused by its water PCB emissions. We measured airborne PCBs at 18 homes and businesses near NBH in 2015, with values ranging from 0.4 to 38 ng m-3, with a very strong Aroclor 1242/1016 signal that is most pronounced closest to th...

This study examines the air pollutant emission characteristics, activity intensity, and trends of mobile sources from 2013 to 2021. The target pollutants include criteria (fine particulate matters, nitrogen oxides, hydrocarbons) hazardous (benzene, formaldehyde, BaP). results indicated that intensity levels road in Taiwan were148 × 109, 156 159 155 109 km/year 2013, 2016, 2019, 2021, respective...

BACKGROUND Atmospheric dispersion models (ADMs) may help to assess human exposure to airborne pathogens. However, there is as yet limited quantified evidence that modelled concentrations are indeed associated to observed human incidence. METHODS We correlated human Q fever (caused by the bacterium Coxiella burnetii) incidence data in the Netherlands to modelled concentrations from three spati...

This study presents one of the first long term datasets including a statistical summary of PM2.5 concentrations obtained from one-year monitoring in 190 cities in China. We found only 25 out of 190 cities could meet the National Ambient Air Quality Standards of China, and the population-weighted mean of PM2.5 in Chinese cities are 61 μg/m(3), ~3 times as high as global population-weighted mean,...

Measures such as improved process design, operation, maintenance, housekeeping, and other management practices can reduce emissions. By improving combustion efficiency, the amount of products of incomplete combustion (PICs), a component of particulate matter, can be significantly reduced. Proper fuel-firing practices and combustion zone configuration, along with an adequate amount of excess air...

Congestion of flights arriving at terminal areas invariably leads to aircraft having to extend their flying time, which often results in the need to orbit at a holding point as aircraft are sequenced to land. This extended flying time can be significantly reduced by the implementation of the delay-on-ground concept, where aircraft flying short sectors are delayed in their departure from the res...

The major criticism of our paper by Anonymous Referee 2 is that we have used, and failed to justify, “a global model for the analysis of a rather local problem”. We disagree with the Anonymous Referee that model underestimation of OH in the presence of isoprene is a local problem. Emissions of isoprene make up approximately one half of emissions of all NMHC emitted globally, both natural and an...