In the recent years, aerosol pollution over Pearl River Delta (PRD) is getting worse, and aerosol cloud can be seen all year round, causing the deterioration of visibility and air quality.

• 近几年来，珠江三角洲地区的气溶胶污染日趋严重，气溶胶云一年四季都可以出现，造成空气质量和能见度下降。