Sequence of at Longevity and economic costs American report of last century Decrease the life time of 4 1 million years /decade Economic loss: usd 8.3 billion Near-drowning: 1.8 million year/decade USD 6.5 billion Burning: 101 thousand years, USD 3.5 billion Traffic accident 500 thousand years, USd 57.8 billionSequence of AT 一 、Longevity and economic costs： 1. American report of last century: Decrease the life time of 41 million years /decade， Economic loss: USD 8.3 billion ◼ Near-drowning： 1.8 million year/decade, USD 6.5 billion ◼ Burning：101 thousand years, USD 3.5 billion ◼ Traffic accident 500 thousand years, USD 57.8 billion