Why is desertification so dangerous in africa?

a.
people are suspicious about sand.

b.
diseases are carried through deserts.

c.
nobody is planning new housing in deserts.

d.
without sufficient farmland, people go hungry.

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

What are three voluntary behaviors that is not controlled by results

What happened in georgia as a result of the supreme court ruling in brown v. board of education? the sibley commission was formed all public schools were desegregated the southern christian leadership was formed the general assembly passed laws to keep schools segregated.