While the professor was pouring the beers into the jar, a belated student, out of breath, burst into the room saying, "A well-done explanation, but there m-u-s-t be another important thing the professor might have missed in his illustration!" Though water -- and anything liquid -- can penetrate room between solid particles like sand, another substance can penetrate water -- AIR and its relatives -- gazes, he went on.
All the class turned to him as if he was the real lecturer when he commented, "For instance, without Oxygen in unpolluted water, fish and other aquatic and overland living things, even human beings, cannot live or have their existence on earth, and we all cannot write, read or say anything now."
He continued,"It is those substances of lower and lower density that are perching over our life -- the Whole Globe. What about the problems of Global Warming? Who are responsible for, and who are to suffer from, these problems? AIR is everything and polluted AIR means Death. It penetrates all that exists -- our body (blood, brain ...,) words, mind; all substances -- solid and liquid alike, etc. I mean OUR GLOBAL COMMON CAUSE IS THE ROOT OF LIFE AND HAPPINESS ON OUR PLANET EARTH." (Phnom Penh, Kingdom of Cambodia)