recycle
v.
to treat (a substance that has already been used) so that it is fit to use again 使再循环，回收利用
renewable
adj.
that can be renewed, esp. by natural processes or good management 可更新的，可再生的
debate
n.
a meeting, esp. in public, in which a question is talked about by at least two people or groups, each expressing a different opinion争论，辩论
deforestation
erosion
n.
the process of eroding or being eroded 腐蚀，侵蚀
faucet
n.
a device through which the flow of water or other liquids is controlled 水龙头
forum
n.
a place where public matters may be talked over and argued about论坛，讨论会
drought
n.
(a long period of) dry weather when there is not enough water 干旱
ecological
adj.
of or concerning ecology 生态(学) 的
efficiency
n.
good productivity or performance 效率
garbage
n.
waste material, e.g. from a house or office, to be thrown away垃圾，废物
gas
n.
(a type of) substance like air, which is not solid or liquid and usually cannot be seen气体
carbon
n.
碳
△
consequence
n.
result结果
consumer
n.
a person who buys and uses goods and services 消费者
convenience
n.
fitness; suitableness; the quality of being convenient 方便
appliance
n.
an apparatus, instrument, or tool for a particular purpose, esp. an electricalmachine that is used in the house 器具，器械，（尤指）家用电器
artificial
adj.
(informal)yes < 非正式> 是
△
addicted
adj.
dependent on something, esp. a drug 成瘾的
◇
ailing
adj..
unwell; ill 不舒服；生病
atmosphere
n.
the mixture of gases that surrounds any heavenly body, esp. the earth 大气（层）
adj.
knowing, understanding, or recognizingsomething 有意识的，有知觉的
constant
adj.
fixed or unchanging 不变的
dam
n.
a wall or bank built across a river to keep back water, esp. to make a reservoir 水坝，堤坝
harmful
adj.
causing or likely to cause harm 有害的，伤害的
hence
adv.
for this reason or from this origin; therefore 因此，从此
host
n.
a person who receives guests and provides food, drink, and amusement for them 主人，东道主
plastic
n.
a light artificial material produced chemically 塑料
pollution
n.
the action of polluting or the state of being polluted污染
profit
n.
money gained by trade or business 利润
◇
ecosystem
n.
生态系统
element
n.
a necessary part of a whole 成份；要素
environment
n.
the surrounding physical and/or social conditions环境
△
evaporate
v.
to change into steam and disappear 蒸发
★
air-conditioning
n.
the system that uses machines (air-conditioners) to control the temperature of the air in a room or building to keep it cool and dry 空调( 系统)
stack
n.
an orderly pile of things one above another 一摞，一叠
starve
v.
to (cause to) suffer or die from great hunger ( 使 ) 挨饿，饿死
style
n.
general manner of doing something which is typical or representative of a person or group, a time in history, etc.风格，方式
an apparatus, service, etc., which gives comfort or advantage 便利设施或用具
◇
deforest
v.
to cut down the forests砍伐（森林）
◇
dioxide
n.
二氧化物
◇
downwind
adj.
in the direction that the wind is moving顺风处
system
n.
a group of related parts which work together forming a whole 系统，体系
wow
int.
(an expression of surprise and admiration) ( 表示惊叹、羡慕 )哎哟! 哇 !
yeah
adv.
shortage
n.
a condition of having less than is needed; an amount lacking 短缺
solar
adj.
using the power of the sun's light and heat 太阳的
solve
v.
to find a solution to, an explanation of, or a way of dealing with (something) 解决，解答
expert
n.
a person with special knowledge or training专家
◇
exploitation
n.
the act of employing to the greatest possible advantage开采
△
fossil
n.
化石
global
adj.
of or concerning the whole earth 全球的
sweat
n.
liquid which comes out from the bod 汗，汗水
v.
to have sweat coming out through the skin 出汗
symposium
n.
a meeting between scientists or other people experienced in a particular field, in order to talk about a certain area of interest研讨会，专题讨论
n.
the action of clearing an area of forest or trees 采伐森林
disaster
n.
sudden serious misfortune causing great suffering and damage 灾难
dispose
v.
to get rid of处理