环境类话题，现在在托福考试中也时常出现。为了让考生更好的了解环境类文章和知识，小编整理了一些环境类的词汇，希望同学们能学习并且进行记忆。
embankment 筑堤 (em + bank + ment)
sediment 沉积(物)= deposit
delta 三角洲the Pearl River Delta
alluvial 冲积的
desertification desert (v.s. dessert)
dust-storm 沙尘暴^ thunderstorm, brainstorm
barren 贫瘠的，不育的，无效的
dune sand dunethe game “DUNE”!
attributable 归因于be attributable to…
deforestation 滥砍滥伐(森林)de + forest + ation<> afforestation/reforestation
log 原木，日志 伐木v.s. logo
vegetation 植物，植被v.s. vegetable, vegetarian
habitat 栖息地 habit (Habit is the second nature.)
ecosystem 生态系统 (eco + system)~ ecology
viability viable “vi”: life养育能力One tool for assessing the impact of forestry on the ecosystem is population viability analysis.
demographic 人口统计的 demo(people) + graph(write) + ic
interdependence inter + dependence
counterbalance 使平衡，弥补 (=offset)counter(against) + balance
mechanism 机理，机制
precipitation 陡降，降水 ( precipice)<> evaporation
