21.   Most people are afraid of losing valuable heat so they keep all windows tightly closed.

22.   More traditionally, ground fog, sometimes called valley fog, forms on a clear night with light winds as the ground rapidly loses its heat to space.

23.   Not only does this lose heat, but it also creates a draft.

24.   Of course, in winter these vents will lose heat, so you have to put doors on them that can be opened and closed when necessary.

25.   Of course it does, but you will still lose heat from the warm area of the house to the cold area, if the barrier is uninsulated.

26.   On a clear, calm night, the air at the ground cools rapidly as it loses heat to space.

27.   Rather than losing heat to the cold night sky, heat radiates from the leaves and back toward the plant.

28.   Roads attached to the ground lose heat only from the top of the pavement.

29.   Skin temperature is controlled by the sympathetic nerves and adrenal gland, part of the system for conserving or losing body heat.

30.   The artery loses heat to the veins, which carry the heat back into the body.