Voice of America: Africa’s climate, more than that of any other continent, is generally uniform. That’s the result of the position of the continent in the tropical zone, the impact of cool ocean currents, and the absence of mountain chains serving as climatic barriers. But across Africa, the landscape is changing. The snowy caps of Mount Kilimanjaro are melting and the shorelines of lakes Chad, Tanganyika and Victoria are receding. The once mighty Lake Chad is half the size it was 35 years ago. These …