大概5000年前这片土地还是富饶的大草原，最近2000年持续不断的沙漠化改变了该国的地貌。
Over 5000 years ago the same land was actually covered with fertile grasslands - the desertification has took place in the last 2000 years.
仅仅60年前，莫耶尔周围是一片有丰沛的草、树木、大象、狮子和犀牛的大草原。
Only 60 years ago, the land around Moyale was savannah with plenty of grass, big trees and elephants, lions and rhino.
我们可以因此得出结论，该地区的气候在40000到30000年前曾剧烈地变化，导致这一区域从林地变成了草原。
We can thus conclude that the climate of the area changed dramatically between 40, 000 and 30, 000 years ago, causing the terrain to change from woodland to grassland.
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