Fog is a cloud that touches the ground.
Sites 3
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- Hong Kong Observatory: Fog What fog is, and how it's different from mist.
- Weather Wiz Kids: Make Fog How to make fog in your own home.
- USAToday.com: Fall Nights Perfect for Forming Fog Describes why cool nights are good for fog, and links to why cloudy nights are less likely to be foggy.