The phrase "air quality challenges" is correct and usable in written English.
You can use it when discussing issues or problems related to the quality of air in a specific area or context, such as environmental studies or public health.
Example: "The city is facing significant air quality challenges due to increased industrial activity and vehicle emissions."
Alternatives: "air pollution issues" or "air quality concerns".
But Bulgaria is hardly alone in having air quality challenges.
While LA and other areas still have air quality challenges, they have done much to clean up their act.
The Obama EPA's move "provides solid support for continuation of the single national program to produce a new generation of clean vehicles to address the air quality challenges facing California and other states," California Air Resources Board Chairwoman Mary D. Nichols said.
Coal keeps dominating the primary energy consumption in China, and is highly-related to the carbon emission and air quality challenge.
The air quality challenge of megacities (population >10 million) has received considerable attention.The 20 megacities in this data set account for ∼15% of the total city population (300 million people) and have a population-weighted mean iF of 83 ppm (IQR = 48 94 ppm, range 25 260 ppm).
The study focused on San Bernardino and Riverside Counties, which both face unique economic and air-quality challenges.
Amatoa, F. et al. Urban air quality: the challenge of traffic non-exhaust emissions.
However, establishing the scale (local, regional, global) and direction of change (improvement or deterioration) of air quality is challenging (Bernard et al. 2001; Rainham et al. 2001; Semazzi 2003; Swart et al. 2004).
Predicting air quality remains a challenge due to the complexity of the governing processes and the strong coupling across scales.
We are shaded from its noise by some tall houses and the contours of the land, but the air quality can be challenging.
Although the IOC admits that "air quality remains a challenge", it has acknowledged that Chicago is committed to a carbon-neutral event.
