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地球上的人和动物每时每刻都在消耗氧气,释放出二氧化碳。据统计,地球上生物的呼吸和煤、石油等燃料的燃烧,每年大约要消耗1千亿吨氧气。随着经济的发展和人口的增多,所耗氧气的质量会逐渐增加,所排放的二氧化碳的质量也随之增加,那么,会不会有一天,地球上氧气耗尽,充满二氧化碳以致人类无法生存呢? 这种顾虑是多余的,自地球大气
People and animals on earth consume oxygen at all times and release carbon dioxide. According to statistics, the breath of life on Earth and the burning of coal, oil, and other fuels consume about 100 billion tons of oxygen each year. With the development of economy and the increase of population, the quality of oxygen consumed will gradually increase, and the quality of the discharged carbon dioxide will also increase. Then, one day, the oxygen on the earth will be depleted, and carbon dioxide will be filled so that humankind cannot survive. Is this concern superfluous from the Earth’s atmosphere?