家处青海河湟谷地，一年四季见不到多少绿色，这些年来国家实行西部大开发政策，工业开发园区随处可见，工厂的高楼和烟囱如雨后春笋般一霎时就冒出一整片，绿色就更为稀缺了。
B-Thing O B-Location I-Location I-Location I-Location I-Location I-Location O B-Time I-Time I-Time I-Time O O O O O O O O B-Time I-Time I-Time I-Time B-Organization I-Organization O O B-Location I-Location O O O O O O B-Thing I-Thing I-Thing I-Thing I-Thing I-Thing O O O O O B-Organization I-Organization O B-Thing I-Thing O B-Thing I-Thing O B-Thing I-Thing I-Thing I-Thing O O O O O O O O O O O O O O O O O O O O