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The word "smog" was coined in the early 20th century, and is a portmanteau of the words smoke and fog [1] to refer to smoky fog due to its opacity, and odour. [2] The word was then intended to refer to what was sometimes known as pea soup fog , a familiar and serious problem in London from the 19th century to the mid-20th century, where it was ...
Peroxyacetyl nitrate (C 2 H 3 NO 5): formed from NO x and VOCs, like ozone. Photochemical smog: particles are formed from gaseous primary contaminants and chemicals. [95] Smog is a type of pollution that occurs in the atmosphere. Smog is caused by a huge volume of coal being burned in a certain region, resulting in a mixture of smoke and sulfur ...
smog, from smoke and fog [2] smothercate, from smother and suffocate [2] Snowmageddon, from snow and Armageddon [2] solemncholy, from solemn and melancholy [2] splatter, from splash and spatter [5] squarson, from squire and parson [2] squirl, from squiggle and twirl or whirl [2] stash, from store or stow and cache [5] staycation, from stay and ...
A diffusion tube is an example of a passive air pollution monitor. Passive devices are relatively simple and low-cost. [6] They work by soaking up or otherwise passively collecting a sample of the ambient air, which then has to be analyzed in a laboratory.
A smoke sample is simply sucked through a filter which is weighed before and after the test and the mass of smoke found. This is the simplest and probably the most accurate method, but can only be used where the smoke concentration is slight, as the filter can quickly become blocked.
This is a glossary of environmental science. Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and interdisciplinary approach to the study of environmental systems.
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A review concluded that there is a lack of attention and action such as work on a globally supported "formal science–policy interface", e.g. to "inform intervention, influence research, and guide funding". [4] In September 2023 a Global Framework on Chemicals aiming to reduce pollution was agreed during an international conference in Bonn ...