In the past hundred years a million people have died in earthquakes，another million have been killed by hurricanes (飓风)and tornadoes(龙卷风)and 9 million have lost their lives in floods.In addition to this, many more millions have died as a result of hunger and disease.We should also not forget in many of the world’s countries drought(旱灾)and serious water shortage are a fact of life，especially in the African Shale area bordering(与……接壤)the Sahara Desert.
Scientists and engineers around the world have made great advances in earthquake engineering.It_is,_of_course，impossible_to_move_cities_such_as_Tokyo(东京)and_San_Francisco(旧金山)that_have_been_built_on_earthquake_belts(带)．But most often it is not the earthquake that kills people.It is the falling buildings，bridges and so on that cause deaths，and such a happening can be greatly reduced by better building programs.
Finally，perhaps we need to consider the natural disaster that we are causing for ourselves.Through our mismanagement of the planet’s resources(资源)we have sped up(加速)the dying out of hundreds of sorts of plants and animals，at the same time possibly destroying our own longterm surroundings for life.Maybe this is one_disaster that could be prevented if we are willing to act with a sense of responsibility(责任)．
1．What is the best title of the passage？(Please answer within 10 words.)
2．Which sentence in the passage can be replaced by the following one?
We should remember the fact that in many areas of the world people live a hard life because of drought and serious water shortage.
3．What does the underlined part in the last paragragh refer to？(Please answer within 10 words.)
4．In your opinion which of the disasters mentioned in the passage is the worst？Why？(Please answer within 30 words.)
5．Translate the underlined sentence in the second paragraph into Chinese.