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00,000。 4 million hectares ? How are people affected by desertification? ? People breathe in _____________. ? People lose their ________________. ? Many families go hungry. ? Many move to cities to ____________. Conclusion: __________________________________ People are suffering a lot from desertification! dirty air homes and farms find work ? Why does desertification happen? ① It naturally happens. ② people plant ____________________ without _________________. ③ Too many animals depend on the same land to ______ . ④ People cut down ______ for fuel(燃料 ) and make space for ______________ . too much on the land giving it a rest eat more farms trees ? What’s the im