What are the desirtification percentages in Africa, America, and the world?

Answer 1

These two websites show the percentages of Africa and the world that are deserts.

http://wiki.answers.com/Q/What_percentage_of_Africa_is_desert

What do you mean by America? the U.S.? North America and South America?

Answer 2

By america i mean just North America

Answer 3

I couldn't find the exact statistics for North America, but as you can see from this map, deserts cover 5% or less of North America.

http://ag.arizona.edu/~lmilich/desert.html

Answer 4

Here's the other site.

http://www.galeschools.com/environment/biomes/desert/index.htm