Industrial air pollution is a global problem that poses serious hazards to the environment and human health. Unpurified waste gas in the process of industrial production is the main cause of air pollution. In order to solve the increasingly serious problem of air pollution, all countries have formul
Delta strain has become a mainstream strain in the world. Data show that 96% of new cases in the UK are infected with the Delta strain, and the number of cases is still rising. The "Delta" variant is further mutated to derive the "Delta+" or "AY.1" variant. Initial data indicated that the Delta+ var
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