correct my gramma mistakes

After the eruption, it will cause serious pollution to the enviroment . The smothers can cover everything, which is dangerous to people. Volcano can cause acid rain. It can kill forest and natural. The ash cloud from the explosive eruption can damage your health, including your eyes, your hair and your lungs and so on. I think this will cause damages to many people's health and their family, the natural disease is very scary and dangerous.

In conclusion, everyone knows that volcano eruption is a dangerous natural disaster in earth. Such like my three topic about the statements of volcano. Volcano is an opening or erupted on the earth.Those include eruption about Volcano.

2012-07-12 15:04:42 補充：
第三行

can kill forest and natural .......................... can harm the nature

After an eruption, it will cause great pollution to the earth environment. The smothers can cover everything and endanger many people. It can cause acid rain to form and kill the forest and plants. The ask cloud can damage people’s health, such as your eyes, hairs, lungs, and so on. I think natural disaster, such as a volcanic eruption, is very scary and damaging. In conclusion, everyone knows that volcanic eruption is a dangerous natural disaster on earth. 跟住的Such like my three topics…則文法句式全錯，又不連貫，沒法修改。可能綜合其他段落重寫吧。

Error and Correction:------After the eruption,they will cause the enviroment (a great pollution).The smothers can cover everything (letting people in danger for their lives.) Volcano (can cause) acid rain which can kill forest and (nature). The ash cloud from an explosive eruption gets everything hurt (including) your health: such as eyes,hairs,lungs and so on. Hence (this natural catastrophe),which is very scary and dangerous, will (cause great damage) to people's health and (suffering in lost of their family).-----In conclusion, everyone knows that volcano is a dangerous natural disaster (on) earth,(such as those) three statements that I (have been shown awareness of). Volcano is an opening (at top) which lava are forced out,or (have been so in the past.)