Human is so pitiful because we can not realize how important nature is in our life. We keep wasting limited nature because we think nature offer themselves to us as unlimited, so foolish humans splash limited nature out whatever, wherever, and whenever we want to use. One of our priceless nature, air is also one of the victims due to human’s selfish. If nature is getting worst, it will be definitely shown up in human’s body. For me, I could realize that the problem of air pollution keeps getting worst. Because of my skin and bronchus. both my skin and bronchus became really sensitive and weak. I went to hospitals both in Korea and America many times, and they all said an immediate cause is excessive air pollution. Not only this problem but also as the article mentioned it, “worldwide, outdoor air pollution reduces the average life expectancy at birth by one year.” I think even though many researchers and scientists have kept studying on the prolongation of life technology, it will be not successful in 100% if we do not care of our nature. I think the best way to do the artificial prolongation of human life is to realize the seriousness of environmental pollution, prevent environmental pollution, and, and take care of natural health. If we do, our health life extension will be automatically lengthened for sure. Therefore, we have to be convinced of our error before all of our natures are dissipated and save nature.