Where is the Sahel?, North Europe, East Asia, South America, South Sahara, Drylands get little rain., False, True, What is desertification?, Rain increases, Rivers deepen, Land degrades, Forests spread, Which is a climate-related cause?, Cooler seas, Less sunlight, More forests, Unreliable rain, Too much well pumping 抽水can cause what?, Fewer crops, More rivers, Dry wells, Lower winds, Population growth increases need the need for_____________., Land and water, Snow and ice, Gold and oil, Ships and ports, Which human action harms dryland soil破坏旱地土壤?, Tree planting, Overgrazing, Mulching soil, Crop rotation, What can happen when land degrades降解?, Lower heat, Cleaner air, Less food, More rain, Which method helps protect soil from wind?, Drain roots排水根, Burn stumps树桩, Pave fields铺设田野, Plant trees, Zai pits use what in the hole?在坑里用什么在洞里？, Waste and manure废物和粪便, Oil and ash油和灰, Plastic and sand, Salt and stones, Microdosing means using fertilizer how?, On leaves only, Tiny amounts, All at once, Across roads, Which method is best with well water?, Sand mining, Clear-cutting, Half-moon pits, Drip irrigation, Half-moon pits mainly trap what?, Livestock, Cold air, Rainwater, Fertilizer smoke

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