<span>Subsistence farming involves farmers growing just enough food that will be adequate for them and their families. So no surplus is farmed for sale. The Green Revolution allowed larger crop yield for farmers by introducing resistance strains, fertilizers and pesticides. As you can imagine, the wide spread use caused a very negative impact on the environment. Subsistence farming was basically revamped by the Green Revolution to allow surplus be produced for sale in developing nations.</span>
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I think shale
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But I'm trying to find the answer too
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The natural resource of Latin America did the first European explorers most desire is the "herb & spices", gold and diamond also.
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