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Unfavorable weather conditions were the main cause of the fog-haze events over the Beijing-Tianjin-Hebei region during the COVID-19 lockdown

Credit: GAO Yi
At the end of December 2019, Coronavirus Disease 2019 (COVID-19) quickly spread throughout Hubei Province and other parts of China. During the 2020 Spring Festival, public activities were cancelled, people tried their best to stay at home, and human and industrial activities were reduced to a basic or minimum level. However, during this period, severe fog-haze events occurred over the North China Plain. What was the leading factor that caused these severe smog incidents? And what were the individual impacts of meteorological conditions and emission reductions?
To evaluate the impacts of meteorological conditions and emission reduction measures on the near-surface PM2.5 (fine particulate matter) during the COVID-19 lockdown, three numerical experiments with different meteorological fields and emission sources were carried out with a coupled meteorology and aerosol/chemistry model (WRF-Chem) by Professor Zhang Meigen and his team from the Institute of Atmosph ....

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COVID-19 lockdown highlights ozone chemistry in China

COVID-19 lockdown highlights ozone chemistry in China
scienceblog.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from scienceblog.com Daily Mail and Mail on Sunday newspapers.

Chong Liao , Yulu Qiu , Hyun Chul Lee , Shixian Zhai , Lu Shen , Melissap Sulprizio , Bo Zheng , Danielj Jacob , Qiang Zhang , Yuli Zhang , Jinqiang Zhang , Su Keun Ku , Kelvinh Bates , Proceedings Of The National Academy Sciences , University Of Information Science Technology , Harvard Johna Paulson School Of Engineering , Northern China , Northern China Plain , Harvard John , Applied Sciences , Nanjing University , Information Science , National Academy , Vasco Mccoy Family Professor , Atmospheric Chemistry , Environmental Engineering ,

Cleaner air, less soil pollution: Unintended but beneficial side effect of Clean Air Act

Credit: Yuepeng Pan
Removal of pollutants from the air, or atmospheric deposition, is a natural cleaning mechanism. However, the removed toxic matters don t just disappear on the Earth. China s Soil Pollution Survey released in 2014 shows that 19.4% of the Chinese farmland soil was polluted and 82% of pollutant was toxic heavy metals such as cadmium, which can cause chronic health problems.
Atmospheric deposition is an important source of these heavy metals in the soil but it tends to be neglected. Unlike sources from irrigation water, sewage sludge, fertilizers and livestock manures, atmospheric deposition can t easily be perceived. And the paucity of measurements also makes it difficult to track what happens to heavy metals when they fall from the air to the soil. ....

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GIEWS Country Brief: China 17-February-2021 - China

English News and Press Release on China about Agriculture, Food and Nutrition, Epidemic, Flood and more; published on 17 Feb 2021 by FAO ....

North China Plain , African Swine Fever , வடக்கு சீனா வெற்று ,

sorghum - Everything2.com

sorghum
Sat Jan 27 2001 at 2:21:30
I remember being in Kansas one time and seeing fields growing
with a plant I d never seen before. Now, of course, I grew up in a large
city in the Eastern United States. When I asked someone what it was, they
looked at me like I was a prize idiot. I eventually found out that the
plant was milo or grain sorghum.
Later, during a trip to the Eastern Shore of Maryland, what did I see
in a field along the highway but the
same plant!
Grain sorghum is the fifth most important cereal crop in the world. ....

Great Plains , United States , North China Plain , China General , Eastern United , Eastern Shore , நன்று சமவெளி , ஒன்றுபட்டது மாநிலங்களில் , வடக்கு சீனா வெற்று , சீனா ஜநரல் , கிழக்கு ஒன்றுபட்டது , கிழக்கு கரை ,