https://books.google.com.hk/books?id=hnTbAgAAQBAJ&pg=PA4&lpg=PA4&dq=chinese+research+perspectives+on+the+environment+volume+3&source=bl&ots=jSKvg0xFw9&sig=YMciAqIi0DS3R_BPOo-073l8XOg&hl=en&sa=X&ved=0CDYQ6AEwBGoVChMIsbmNmebdxwIVCxmOCh2fwgf8#v=onepage&q&f=false

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