"Throughout history, humans have cultivated about 7,000 species of - TopicsExpress



          

"Throughout history, humans have cultivated about 7,000 species of plants. In the last century, three-quarters of the genetic diversity of agricultural crops have been lost. Thirty crops now provide 95% of our food needs, with rice, wheat, maize, and potato alone providing 60%. Eighty-five percent of the apple varieties that once existed in the US have been lost. Vast fields of genetically identical crops are much more susceptible to pests, necessitating increased pesticide use. The lack of diversity also endangers the food supply, as an influx of pests or disease can wipe out enormous quantities of crops in one fell swoop."
Posted on: Tue, 25 Jun 2013 11:33:46 +0000

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