How has man's presence in the Sahel contributed to the potential of desertification of the area? ALL BUT ONE could apply. A) deforestation
B) climatic changes
C) overgrazing by livestock
D) the buildup of salt in irrigated soils

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

a. to encourage apoptosis

the answer is c.mitochondria. glad to .