Synonym: cloudiness, fog, haziness, smoke. Similar words: homograph, demography, haemoglobin, demographic, homogenized, homogeneous, homogeneity, primogeniture. Meaning: [smɑg /smɒg] 
n. air pollution by a mixture of smoke and fog.
n. air pollution by a mixture of smoke and fog. 
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1. Smog is a major problem in Athens.
2. We were prevented by heavy smog from seeing anything.
3. The city was overhung with the pollutant smog.
4. The river appeared as if enveloped in smog.
5. Smog used to bring London traffic to a standstill.
6. Smog hung in the sky .
7. Cars cause pollution, both smog and acid rain.
8. Greenhouse gases combine with hydrocarbons to form smog.
9. On 75 days the smog was so bad that schoolchildren were advised to stay indoors.
10. Smog and acid rain, water pollution and sewage disposal, dams and river-flows will become ever more contentious issues.
11. Eliminating the occurrence of first-stage smog alerts requires long-term reductions in the baseline pollution levels.
12. The streets are clean, there's no smog to dull the sunshine, and the skyscrapers don't overpower.
13. Ethyl Corp. says it reduces smog and presents no threat to cars or public health.
14. Hydrocarbon smog from traffic; smoke from a coal-fired power station.
15. The coppery smog was so thick it obscured the setting sun.
16. The thick smog hung in the air, obliterating the hills from view.
17. The new measure is designed to help combat smog in cities, especially in California.
18. The EPA has issued a comparison of smog levels in various cities.
19. As we flew into the airport, we could see a murky yellow smog hovering over the city.
20. For example, although industry is often considered as a major contributor to smog, this may not always be the case.
21. He remembered his oxygen mask and placed it over his mouth after removing the smog mask.
22. So did women who gave birth after the thick London smog of 1952.
23. In sunlight, VOCs can react in the lower atmosphere with nitrogen oxides to generate photochemical smog.
24. Consequently, industrial stacks above about 150 metres or even 100 metres may contribute little pollution to smog locally.
25. In the fifties, doctors treated a number of people for the effects of smog in places like London and Birmingham.
26. They were blackened with soot deposited by the interminable smog.
27. Oh yes, and Hollywood, movie stars, freeways,[sentencedict.com/smog.html] Baywatch and smog.
28. In the process it invented mass entertainment, the 10-lane freeway and smog.
29. Its engine acts like a vacuum cleaner by removing pollutants to become a smog buster.
30. Much more obvious is air pollution, the ugly brown cloud that brings on smog alerts and leaves residents wheezing.
More similar words: homograph, demography, haemoglobin, demographic, homogenized, homogeneous, homogeneity, primogeniture, smoke, smother, smote, smolder, cosmos, smooch, smooth, machismo, osmosis, smoking, smooth out, smoulder, smoothly, nonsmoker, dismount, smooth down, desmosome, cosmonaut, smoldering, spasmodic, cosmology, seismology.