The correct answer to this question is: colonization.
The ozone is an important feature which blocks out the radiation
The Earth's rotation deflects, or changes the direction of, these wind-driven currents. This deflection is a part of the Coriolis effect. The Coriolis effect shifts surface currents by angles of about 45 degrees. In the Northern Hemisphere, ocean currents are deflected to the right, in a clockwise motion.
NAIROBI, Kenya — From Sudan to South Africa, on shantytown streets and desert battlefields, tribal conflicts are fragmenting Africa’s nations and tormenting its peoples.
Even the anti-apartheid movement in South Africa often is beset by tribal rivalry that in recent months has seen black groups fighting each other, sometimes shattering black unity in the battle against the white government.
