The Cost of Oxygen

"The cost of Oxygen!! Very interesting!!! In one day a human being breathes oxygen equivalent to 3 cylinders. Each oxygen cylinder on an average costs Rs. 700/-, without subsidy. So, in a day one uses oxygen worth Rs. 2,100/- And for a full year it is Rs. 7,66,500/-. And, if we consider an average life span of 65 years; the costs of oxygen we use become a staggering sum of Rs. 500,00,000/- = Rs. 50 million. All this oxygen is derived FREE OF COST from the surrounding trees. Very few people look at trees as a life-giving natural RESOURCE. There is rampant tree-cutting going on everywhere WHICH WE MUST STOP." Lakkaraju Pragnan Kumar