air pollution

презентация powerpoint air pollution air pollution prepared: jumayev bekzodjon student of group 205a checked:damirova g . . sources of air pollution solving ideas conclusion what is air pollution ? plan what is air ? air is an invisible mixture of gases that surrounds the earth. it is a clear gas in which living things live and breathe. air contains essential substances such as oxygen and nitrogen, which are essential for the survival of most species. humans are certainly one such species. sometimes the word "atmosphere" is used instead of the word "air". what is air ? what is air pollution ? air pollution is contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies …

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