Insect pheromones are odor molecules used for chemical communication within a species. Sex pheromones play a crucial role in the mating of many insects. Species-specific odors attract males and females of the same species. ...
Ecology
Apr 11, 2024
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2
Sunlight has a major influence on chemical processes. Its high-energy UV radiation in particular is strongly absorbed by all materials and triggers photochemical reactions of the substances present in the air. A well-known ...
Optics & Photonics
Apr 10, 2024
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31
Elevated surface ozone concentrations in China are posing a significant threat to both human health and crop yields. Extreme heat can greatly exacerbate ozone pollution through both complex chemical and physical processes. ...
Earth Sciences
Mar 27, 2024
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19
Ammonia is one of the most widely produced chemicals in the world, and is used in a great many manufacturing and service industries. The conventional production technology is the Haber-Bosch process, which combines nitrogen ...
Analytical Chemistry
Mar 21, 2024
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8
The air quality in Swedish cities has improved continuously over the last 20 years, according to research based at the University of Gothenburg. Several thousand deaths may have been prevented every year, thanks to better ...
Environment
Mar 20, 2024
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7
Agricultural activities and livestock farming are key contributors to the concentrations of hazardous pollutants for health and the environment in the atmosphere, but the potential action in these sectors is often overlooked ...
Environment
Mar 18, 2024
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1
Natural gas flaring, or burning, is commonly used in parts of the United States to dispose of the gas byproduct from oil extraction. The flare's combustion converts hydrocarbons to carbon dioxide and water, which lessens ...
Environment
Feb 7, 2024
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33
Sulfate-nitrate-ammonium (SNA) and other atmospheric aerosols play a significant role in influencing both atmospheric and environmental conditions. These aerosols impact climate directly through scattering and absorbing solar ...
Earth Sciences
Jan 26, 2024
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3
Over the last decades, air pollution emissions have decreased substantially; however, the magnitude of the change varies by demographics, according to a new study by Columbia University Mailman School of Public Health. The ...
Environment
Jan 17, 2024
2
58
A major report for the United Nations has put forward solutions to halve nitrogen pollution from agriculture and the food system in Europe, including reducing meat and dairy consumption, fertilizer use and food waste.
Environment
Dec 19, 2023
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20
The term nitrogen oxide typically refers to any binary compound of oxygen and nitrogen, or to a mixture of such compounds:
(Note that the last three are unstable.)
Chemical reactions that produce nitrogen oxides often produce several different compounds, the proportions of which depend on the specific reaction and conditions. For this reason, secondary[clarification needed] production of N2O is undesirable, as NO and NO2 — which are extremely toxic — are liable to be produced as well.
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