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water polution

introduction of unwanted agents into water that lower its quality


the gradual transformation of habitable land into desert

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.


the gradual transformation of habitable land into desert


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

human capital

the skills and knowledge gained by a worker through education and experience


the process of getting into and operating one's own business

economic development

The improvement of living standards by economic growth.

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