Winter chill, a vital climatic trigger for many tree crops, is likely to decrease by more than 50% during this century as global climate warms, making California no longer suitable for growing many fruit and nut crops, maintain researchers from the University of California, Davis.
California Goes Nuts Over Declining Winters Anonymous USA Today; Dec 2009; 138, 2775; Docstoc pg. 14 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.
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