They stop people from burning coalin houses and factories in the city, and from putting dirty smoke into the air.
他们阻止人们在城市里的房子和工厂里燃煤，阻止人们把脏烟排放到空气中。
2
There was a row of brick houses, blackened by smoke.
那里有一排砖房，全被烟熏黑了。
《牛津词典》
3
Just as a person who smokes chooses to light up, nonsmokers have a choice, too - to walk away from other people's smoke at home, school, work, restaurants, even friends' and family members' houses.