Dry winter climate has always been a major problem that plagues people's lives, especially in the northern hemisphere, where humidity has dropped to historical lows in many places. According to a report by China.com on March 21, 2025, the relative humidity in some areas of northern my country and the Qinghai-Tibet Plateau is even less than 10%, such as 4% in Shijiazhuang, 5% in Hohhot, and 6% in Beijing, Tianjin and Taiyuan.
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2025-07-15