环境保护、动植物保护 该类别主要包括：保护森林、水污染、汽车尾气、沙尘暴、温室效应、节约资源、垃圾污染。

　　1、the exhaustion of resources;

　　2、pollution from industrial production transform many clean rivers into undrinkable water.

　　3、the convenience brought by cars, their harmful impact on the atmosphere.

　　4、garbage output, such as plastics and glass.

　　5、deforestation Global warming, current greenhouse effect remains out of control

　　6、human exploitation of natural resources