An air quality simulation model-column model for describing photochemical smog pollution at Xigu district in Lanzhou has been developed.

以兰州西固地区为研究对象，建立了描述该地区光化学烟雾污染的大气质量模拟模式——柱子模式。

youdao

There are increasing concerns on the air pollution caused by photochemical smog in cities.

城市的光化学烟雾引起的大气污染越来越引起人们的关注。

youdao

It's also more likely that high pollution levels will occur because heat creates the conditions for photochemical smog.

CNN: In-Depth Specials - City Limits