京津冀及周边地区预计出现一次中度及以上污染过程，专家解读

Group 1 - The air quality in the Beijing-Tianjin-Hebei region is expected to deteriorate from November 4 to 8, with pollution levels potentially reaching moderate to heavy [1][4] - Meteorological conditions are unfavorable for pollution dispersion, with increased regional emissions contributing to frequent pollution events [2][3] - The forecast indicates that from November 4 to 5, the region will experience poor atmospheric dispersion conditions, leading to light to moderate pollution levels [3][6] Group 2 - Specific areas, such as southern Hebei and northeastern Henan, may experience heavy pollution on November 6, while the northern region is expected to see slight improvements [4] - The increase in industrial activity, including a 3% rise in operational rates for cement and brick industries and a 7% increase in heavy truck traffic, is expected to elevate regional emissions [3] - By November 9, a strong cold front is anticipated to improve air quality across the region, with most areas expected to have good air quality [5]