How can a world have permanent cloud cover?

The inhabitants of my Earth-like planet live high up in the atmosphere at ~1500 meters. When they look down, I don't want them to be able to see the ground. I figure the best way to accomplish this is to have cloud cover below them. However, the cloud cover needs to always be there. No break, no patches of clear sky. The clouds are always there, and they always cover the entire surface of the planet (they can disperse over an ocean if necessary - no one lives above the oceans).

How can I achieve complete and permanent cloud cover over the ground?

Notes:

• The surface is uninhabited, so you can have whatever you want there, as long as it is natural (aka, no pollution).
• This is a fantasy/medieval setting, so modern gases/pollutants from above are not an option.
• Because my people live above the clouds, the lower the clouds the better.

posted about 7 years ago

Thomas Myron‭

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