Scientists sound alarm as black soil erodes in NE China
Monday, 3.9.2007“… The density of organic substances in the soil has fallen from 12 percent in the 1940s to less than 2 percent … excessive farming, overuse of fertilizers and relentless logging have caused erosion and degeneration of the soil quality …”. Quelle: Xinhua. Vgl. Artikel in Renmin Chengshi Wang.