Web30 Mar 2024 · Air pollution is contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies the natural characteristics of the atmosphere. Household combustion devices, motor vehicles, industrial facilities and forest fires are common sources of air pollution. Pollutants of major public health concern … Web25 Sep 2024 · In August, Beijing municipal authorities reported that PM2.5 concentrations in January through July were down 6.7 percent year-on-year to 42 micrograms per cubic meter. But beyond the data and ...
10.11: Photochemical Smog - Chemistry LibreTexts
WebNOx gases can cause acid rain, and they also react in the atmosphere with other pollutants to make photochemical smog. Smog can have major health effects, causing asthma … Web14 Mar 2024 · The chemical reactions produce sub-micron sized particles and harmful by-products that may be associated with adverse health effects in some sensitive populations. Classifications of VOCs When discussing indoor environments, all organic chemical compounds that can volatize under normal indoor atmospheric conditions of temperature … cda cd action
Smog - an overview ScienceDirect Topics
Web31 Mar 2024 · Ground level ozone is created when sunlight reacts with certain chemicals that come from sources of burning fossil fuels, such as factories or car exhaust. When particles in the air combine with ozone, they create smog. Smog is a type of air pollution that looks like smoky fog and makes it difficult to see. Web23 Jan 2024 · As 2016 gave way to 2024, residents of Beijing, Tianjin, and many other northern Chinese cities suffered through the longest stretch of stifling air pollution ever recorded in the country. They ... WebWhen sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere, photochemical smog is formed. The chemical formation of airborne particles and ground-level ozone occurs in the presence of sunlight. This type of smog does not require smoke or fog. butchs place