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Existing comment: Conserving Diversity

Why Do We Need Variety?
Your local grocery store or farmers' market may seem like a cornucopia of amazing foods -- more diverse than ever before. But is it? There are thousands of plant species that are edible to humans, but we actually use only a small portion for food.
And while the shelves may be full of meat, milk and eggs, these come from just a few breeds of livestock; many others are in danger of becoming extinct. So farmers and scientists are developing creative methods, from community and international seed "banks" to habitat and on-farm conservation, to protect plant and animal diversity.
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