11.   Fog forms when moist air is cooled to saturation.

12.   He devised a way not only to cool the air, but also to regulate its humidity by drawing air through a fine spray of water.

13.   If the air is cooled enough, condensation occurs and clouds form.

14.   In addition to cooling the air, air conditioners reduce humidity, and that helps us feel more comfortable.

15.   In summer, the down-blowing air will help bring warm air near the ceiling downward, mixing with cool air.

16.   In the countryside, trees provide cooling shade, and water evaporating from leaves cool the air.

17.   Inhaled cold air is rapidly warmed as it enters the body, and exhaled air is cooled before leaving.

18.   Just carry a Mister Fan to cool the air while you walk.

19.   Moist air is cooled as it ascends resulting in condensation that eventually leads to rain and snow.

20.   On Friday, dense fog covered much of the upper Midwest when mild air was cooled to saturation as it passed snow-covered terrain.