causes of water pollution:
- by factories, industrial parks not handle well the nature Themes-> acid rain
- caused by everyday activities of man
- man does not know how to handle the substance of fertilizers study, the waste (dead animals, cattle, poultry) down rivers
- due to landslides along rivers, lakes and rolling hills make water flow under mud, sand, soil contamination
đang được dịch, vui lòng đợi..
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