21.   All the gadgetry inside generates heat.

22.   But in general the sale seemed to generate little heat.

23.   But no issue generated more heat or triggered more impassioned declarations than abortion.

24.   But no issue generated more heat or triggered more passionate declarations than abortion.

25.   But the story also generates such heat because supporters and opponents of this view offer equally compelling arguments defending their respective cases.

26.   But this generates heat, and also imposes limits on miniaturization of computer chips.

27.   But when they are clinging tightly to human skin, sweat is released, the pH of the fabric rises, and friction with the skin generates heat.

28.   Carmakers are scrambling to figure out not just how to generate heat, but how to keep hot cars from getting cold.

29.   Cities generate heat, creating rising air currents that could carry anthrax germs high into the wind, diluting the microbes and making them less likely to kill.

30.   Cities generate heat, and rising air currents can carry anthrax germs high into the atmosphere, diluting the cloud of microbes and making them less likely to kill.