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主题:《茗谈114》:天坪工程 -- 本嘉明

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家园 I want to remind you

that the Central California Valley, now the source of 40% of the U.S. agricultural outputs (in terms of veg. mostly), comes out of a barren and desert-like land.

The whole Southern California was transformed by human interference.

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有趣有益,互惠互利;开阔视野,博采众长。
虚拟的网络,真实的人。天南地北客,相逢皆朋友

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