1、Earthquates,floods,sandstorms,lahar(火山泥流),mudflo(泥石流) and volcanic eruptions.
2、Pouring dirty water to the river,cutting down too many trees,getting off harmful gas to the air and killing wild animals.
只做参考,不一定没有错误的地方
1、Earthquates,floods,sandstorms,lahar(火山泥流),mudflo(泥石流) and volcanic eruptions.
2、Pouring dirty water to the river,cutting down too many trees,getting off harmful gas to the air and killing wild animals.
只做参考,不一定没有错误的地方