21.   DynaGen said it was developing NicCheck II, a similar test to detect passive exposure to tobacco smoke.

22.   EPA and health officials compare the effects of the haze to breathing secondhand tobacco smoke.

23.   Environmental tobacco smoke usually comes from cigar, cigarette and pipe tobacco.

24.   He speaks with a softly elegant accent, and he deplores the American paranoia about tobacco smoke.

25.   Her monitors show the immediate effects of tobacco smoke.

26.   Imagine a world where the carbonated drinks have gone flat, the sandwich-makings are like cardboard, and the air hangs like week-old tobacco smoke.

27.   It has a considerably higher content of known carcinogens than tobacco smoke.

28.   It also marks the first time a jury will consider whether tobacco smoke in the environment, rather than smoke specifically inhaled by smokers, causes diseases.

29.   Kleinerman did extensive research on the effects of tobacco smoke on lungs and contributed to the diagnosis of lung diseases and other occupational hazards for coal miners.

30.   Many people find tobacco smoke offensive.