How can a world have permanent dense fog?

I recently asked a question about how a world could have permanent cloud cover. The answer was to turn the world into venus.

However, my purpose for cloud cover was to have the people living above it not be able to see the surface when they look down. Venus' clouds extend quite a ways, to the point where anything above them is simply too high up to support life. Therefore, I need to bring the life much closer to the surface.

I still want the surface completely and permanently covered by fog or low clouds. How can I do this?

Notes:

• If possible, I want my people to be above the clouds, not in them.
• The surface of the planet does not matter; you can do anything you want to it to achieve the fog/clouds.
• The setting is medieval/fantasy, so everything has to occur naturally.

posted about 7 years ago

Thomas Myron‭

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