recently ,natural disaster or manmade hazard hit us unexpectly . SW China drought, wangjialin coal mine tragedy ,yushu earthquake seems that we hit by bad luck .but i think all of those can be avoided . please don't think that i am a cold-blooded .i feel uneasy when i heard one after one bad news . maybe we should view the issue on the another aspect . severly drought happen in sw , the weather condition is the last one to be blamed . we can see from the TV that in SW , irrigation infrastructure are out of sight. as a country with 13B population , food safty should be place on strategic level . but unfortunately , we didn't pay attention untill the problem out of control. countless tragedy can be avoided . wangjialin coal mine accident ,if the employer abide strict principle , the tragedy wouldn't happened .for the reason the our country still a society run by several people no the law . the 7.1-magnitude earthquake in yushu Qinghai province has left 617 people died .but have u note that ,the death toll in 8.8-magnitude Chile earthquake is 507.on the contrast ,60 thousand were killed in 8.0-magnitude Wenchuan earthquake .Why ?? most of them were killed by the substandard building !!! pls dont take it grant that buildings are doomed to collapse in earthquake !!!