1）3-6(p54-59) p55-2-2+3 課文翻譯(兩段)

Only about 0.024% of the earth's vast water supply is available to us as liquid freshwater in accessible groundwater deposits and in lakes,river,and streams. The rest is salty for us to use ,is stored as ice,or is too deep underground to extract at affordable prices using current technology
We alter the water cycle by withdrawing large amounts of freshwater , clearing vegetation anderoding soils, polluting surface and underground water, and contributing to climate change (red arrows and boxes in figure 3-18)

地球上好大的水資源,其中大約0.024%是給我們使用.因為淡水處存在容易取得的湖-河中,其他的水資源都是存放為冰或者在深地下,如果我們要提取這些水資源,以現今的技術,我們需要耗費太多金錢和技術資源. 當我們改變水的週期,消除植被和腐蝕土壤,就會有相當的淡水受到影響,會汙染地下水源,進而造成氣候的變化.