Ozone (O3) is a major smog-associated oxidant with well-established respiratory effects, including decrements in lung function, airway injury and inflammation, compromised host defense, and asthma exacerbation (Hollingsworth et al. 2007; Mudway and Kelly 2000).
Dr Sean Semple, of the University of Aberdeen, who analysed the results, said: "When smoking takes place at home, the indoor air pollution levels are comparable with those measured during major industrial smog events in cities like Beijing and Singapore.
Young children of smokers are being exposed to high levels of nicotine intake and air pollution comparable with major industrial smog, according to a study by an anti-smoking charity.
They are also a major ingredient in smog.
Weather is a major factor affecting smog levels in the Chinese capital.
Ethanol tends to evaporate easily, and unburned evaporated fuel is a major ingredient of smog.
Ground-level ozone, which is odorless and invisible, is a major component of smog on hot summer days.
The smokestack controls will reduce both soot and nitrogen oxides, major sources of smog and acid rain.
Dr. Marufu said they had expected to find cleaner air -- after all, power plants are a major contributor to smog.
He omitted to mention that coal consumption, China's biggest source of energy and a major cause of smog, is expected to continue rising.
