<span>They believed labor unions were preventing the wage level from galling to its appropriate level.</span>
Your answer would be Robert Hooke. He was looking at a cork through a new microscope.
Desertification in the Sahil has caused a loss of farmland and migration a farmer south for more fertile land. The Sahara desert that stretches across most of northern Africa creates a barrier that divides the African cultural groups in the south from Muslim and air up in the north.
Nile Valley I hope this helps!!