nbsp;    （25）Landslide
（26）Hurricane                                                 （27）Shortage of water resources
（28）Shortage of fresh water                              （29）Harmful chemicals
（30）Poisonous/toxic gases                                 （31）Carbon monoxide
（32）Urban smog                                              （33）Industrial waste
（34）Hazardous nuclear waste                            （35）Radioactive pollutants
（36）Waste gas sent off from automobiles           （37）Car emission standard
（38）Non-biodegradable material                         （39）Throw-away lunchbox