African Sahara 'greening' can alter Northern Hemisphere climate, modeling study finds
Africa's Sahara Desert may be considered a vast expanse ... Consequently, strengthening of monsoons in the Northern ...
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Introduction to Russia
It is a large country in the Northern Hemisphere. The tundra biome is the ... can remain permanently frozen for long periods of time. Deserts close desertAn area that receives less than 250 ...