people should save the endanger animals, if their extinctions are due to humans' activities.  But it is also human's responsiblity to save the aniamals which seems not because of human direct activities cause their extinctions.   Protecting the varity of speciecs in the world is an important thing even more important than some economic development from a long aspects.

      Of course, people should be responsible to the animals that their endangerd situations are because of human's activity.    There are many specices in the world are going to extinct because humans' direct influnce, such as hunting the aniamls for food, for elaborations and destroy their growing balance, these actions directly cause the animals' endanger.  And aniamls' exsition have their meaning, they can keep the environment's balaence to avoid one day we have no meat to eat and help prevent some dangerous animals grow stronger to hit people.   Since people and animals both are the specices in the world, there is not a inequity between them, even human think they are more excellent.  Meanwhile some animals just like a cultural symbol. for example, panda in China.  Pandas in China is not only a specises, they are a symbol of China's appearence, and they as good gifts to express the chinese people's amible.  If the pandas finally extinct, there would be a big lost to China even the world,, not matter from the point of environment ot from the country's culture.

      Meanwile, it is not wisdom for human not potect animals which seems not endangerd because of humans' action.  animals and people both live in the earth, there must be some relations between the two, some might canot be seen.  People's actions, such as poluting the air which aniams breath, poluting the water which animals drink and cutting forests and making the plaetue empty which make aniamls lost their home for reproducing and defending amity or having a rest.  Though some elements liking climate changes may cause the animals endangered, how can people say there is no relationship between people's actions and cliamte changes, since factories have been built everywhere and air pollution make the climate change quickly.

      Some people may think protecting this animals may cost too money which should be use in other important field, developing the people's living condition for example.  It is true that prevent the animals' extinction may cost a lot of money.  In America, the zoo here was gifted two pandas, and as a report, in order to ensure the living condition in America, the zoo have to spend millions to take care of the animals, which is not a small amount could be use in medical systems completing.  However, at present these money seem use in the wrong place, but consider the possible result if the animals lost in the world in a further day.  Where could we find the food and medicine and how could we keep the environmental balance just by ourselves.  So from a longer point, protecting animals from extinction is important.