Beijing: China has seen its air quality worsen a little in the first quarter, particularly in the Beijing-Tianjin-Hebei region, the national environmental authority said.
“In the first three months, 71% of days in 338 cities tracked had good air quality, 0.9% higher than the same period last year, but the concentration of PM2.5 increased 3.3% year-on-year,” said Liu Zhiquan, head of the environmental monitoring department at the Ministry of Environmental Protection.
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