But safety problems exist,such as sinking,drowning,and fire and explosion resulting from waste firedamp,etc,because of unmatching man-machine factors.

• 目前在水陆交通较发达的城市,生活垃圾常通过水路清运,由于人机因素不相匹配,存在诸如沉船、淹溺、垃圾沼气引起船舱起火爆炸等安全问题。