What does our earth look like?
How is our living environment?
Water pollution：
•Water pollution is the contamination of water bodies such as lakes,rivers,oceans,and groundwater.
Air pollution ：
Air pollution is becoming a severe problem,which mainly caused by transport action and factories production.
The White pollution （白色污染 指垃圾袋之类）
The global warming 温室效应
Increasing global temperature will cause Melting of glaciers and will change the amount and pattern of precipitation,including an expanse of the subtropical desert regions.Other likely effects include increases in the intensity of extreme weather events.