introduction of unwanted agents into water that lower its quality
sub saharan africa
The region south of the Sahara Desert in Africa; includes some of the world's richest deposits of minerals, yet still remains one of the largest regions of undeveloped natural resources in the world.
a strip of land that divides the desert from wetter areas
a forest with heavy annual rainfall
the special line of work you have adopted as your career
the skills and knowledge gained by a worker through education and experience
the process of getting into and operating one's own business
The improvement of living standards by economic growth.