The question as it appears in the 09/11 edition of Specs & Techs from GlobalSpec:
You and the family take a trip to the tropics for vacation – a nice change of pace from home in the desert. Arriving at the hotel, the windows in your room are flung open, but the kids won't take the hint and walk down to the beach. When they aren't jumping on the bed, they're dragging their socks across the damp carpet. Fortunately, their attempts to zap each other are futile. Giving up, the youngest finally asks, "Why don't you get a static shock when the air is humid?"
(Update: Sept 18, 8:42 AM) And the Answer is...
In a humid climate, a thin layer of water adheres to solid surfaces – even carpet. Unlike the water vapor in the air, however, this surface water contains minerals such as salts that provide grounding. Although the answer to this challenge question involves humidity, it's not because "humid air conducts electricity". While it's true that humid air contains water, the water in the air doesn't contain minerals. Therefore, humid air is not a good conductor. With the mineral-laden water layer on the carpet, however, even the kids socks don't have a chance to build up enough charge.
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