Water shortage is a problem which becomes more and more serious.This is not only a problem other countries will meet,but also a globle problem.So we should take it seriously and take effective measures.
the problem water shortage is growing worde and worse, which is not a problem of one single country but also global. Thus, we should take this problem serious and make efficent efforts.
the shortage of water sources has been a more and more severe problem.and it is not national but global. therefore, wo should be serious on it and take effective masures.
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024