Part three地难豪层的量 Mass Wasting processes There is nothing inorganic. The earth is not a mere fragment of dead history, stratum upon stratum like the leaves of a book, to be studied by geologists and antiquaries古玩家 chiefly, but living poetry like the leaves of a tree, which precedes flowers and fruit-not a fossil earth, but a living earth aa Henry David Thoreau 环境地质学 Environmental GeologyPart three 地球表层的塑造过程 环境地质学Environmental Geology Mass Wasting Processes There is nothing inorganic.... The earth is not a mere fragment of dead history, stratum upon stratum like the leaves of a book, to be studied by geologists and antiquaries古玩家 chiefly, but living poetry like the leaves of a tree, which precedes flowers and fruit-not a fossil earth, but a living earth.... Henry David Thoreau