How much of the Sahara is covered in sand?

15%
35%
55%
75%
The Sahara is mainly rocky hamada (stony plateaus).
lukasz Poland
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Answers by country

15%
35%
55%
75%
answers
flagPoland
32%
17%
17%
31%
1080
flagthe United States
19%
15%
18%
46%
82
flagthe United Kingdom
14%
21%
14%
50%
14