The density of O3 tends to rise as PM2.5 falls, according to the Chinese Academy of Sciences, as less particulate matter creates a favorable environment for the formation of O3.
The decision was revealed as the city reported its 19th and 20th COVID-related deaths on Monday-a 76-year-old woman and a 92-year-old man who were residents of Tsz Wan Shan.
The dialogue of foreign ministers of China and the quartet of CELAC is a mechanism for the two sides to have regular consultations on regional and international issues of mutual interest.
The device works by triggering a fan filter when a portable sensor detects air pollution reaching "dangerous levels".
The document was signed in Kiev by Luo Zhigang, chairman of the DEIC, and Eduard Bondarenko, director general of the Donbasenergo.
The digital economy is emerging as an area of focus for future cooperation between China and other ASEAN (Association of Southeast Asian Nations) countries, an expert said.
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The death toll on Tuesday stood at 78. Fifty-six bodies had been identified as of Monday, with 22 others unknown. After DNA tests, 25 of the 28 people previously reported to be missing were confirmed dead.
The design of the innovation system should be top-down, with top-level management to coordinate resources.
The demand was debated during the first day of the court hearing.
The disaster insurance system is designed to ease financial burdens for the government as post-disaster reconstruction is mostly financed by the state.