Perhaps the composite cone volcanoes
I am absolutely sure that <span>the percent of the Sahara Desert is covered by sand sheets and dunes is definitely 25 %. Even though it might seem weird, it is actually correct and here are the pic from artcicle about Sahara which will pose as a proof : )
Do hope it will help!
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Whitney Smith was credited for the making of the "Global Arrowhead".
Hope this Helps!
Plants and trees absorb the carbon and make oxygen with it.