![Krakow, Poland. 8th Nov, 2018. A smog cloud is seen behind Wawel Castle. Today the dust concentration standards PM10 reached 93 micro per cubic meter, when the normal value is 50. Credit: Krakow, Poland. 8th Nov, 2018. A smog cloud is seen behind Wawel Castle. Today the dust concentration standards PM10 reached 93 micro per cubic meter, when the normal value is 50. Credit:](https://c8.alamy.com/comp/R12WY2/krakow-poland-8th-nov-2018-a-smog-cloud-is-seen-behind-wawel-castle-today-the-dust-concentration-standards-pm10-reached-93-micro-per-cubic-meter-when-the-normal-value-is-50-credit-omar-marquessopa-imageszuma-wirealamy-live-news-R12WY2.jpg)
Krakow, Poland. 8th Nov, 2018. A smog cloud is seen behind Wawel Castle. Today the dust concentration standards PM10 reached 93 micro per cubic meter, when the normal value is 50. Credit:
![SOLVED:Listed below are measured amounts of lead (in micrograms per cubic meter; Or ug in the air: The EPA has established an air quality standard for lead of 1.5 The measurements shown SOLVED:Listed below are measured amounts of lead (in micrograms per cubic meter; Or ug in the air: The EPA has established an air quality standard for lead of 1.5 The measurements shown](https://cdn.numerade.com/ask_images/a75adf62aecb48a4a164ecf078be4f73.jpg)
SOLVED:Listed below are measured amounts of lead (in micrograms per cubic meter; Or ug in the air: The EPA has established an air quality standard for lead of 1.5 The measurements shown
![Prof. Jiakuan Yang Huazhong University of Science and Technology Air Pollution Control Engineering. - ppt download Prof. Jiakuan Yang Huazhong University of Science and Technology Air Pollution Control Engineering. - ppt download](https://images.slideplayer.com/26/8636803/slides/slide_24.jpg)