洛_洛y
幼苗
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Deserts do not stay the 【same】size.Sometimes they grow bigger .Sometimes they get 【smaller】.The world's biggest desert,the Sahara ,is in Africa.Right now ,the Sahara desert is growing 【fast 】 . Why is the Sahara growing In some places ,people farm too【much】.In other places animals eat all the grass .Or ,people cut down the trees .This 【makes】the soil weak .Weak soil lets the desert grow . Why is it a problem People cannot 【 grow】 food in the desert .people cannot build houses ,or schools in the desert .So ,people must【leave】their homes .They must live somewhere else . What can people do They can【plant 】 trees .They can also farm less .These things make the soil stronger .【 Maybe】 the Sahara will stop growing .It’s a big problem .Many people must work 【together 】 to solve it .
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1年前
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