Oxygen – gas without color, a smell and taste. Is on the second ambassador of hydrogen the place by quantity on our planet. Chemically active nonmetal. Strong oxidizer. It is possible to extract oxygen, using chemical reactions of decomposition of potassium chloride (potassium chlorate) and in small amounts to receive potassium permanganate heating (potassium permanganate) and saltpeter (potassium nitrate). Also oxygen can be extracted from hydrogen peroxide.

The biosphere of the planet already long time experiences serious strain. To keep the house, the mankind needs to make purposeful efforts. The ecology, integrated science about the environment helps to solve similar problems. The modern ecology consists of several interconnected tiers, on each of which the specific problems concerning the environment of natural dwelling of the person are considered.

Perhaps, it is impossible to find an element, so necessary for life, as oxygen. If without food of people several weeks, without water several days, then without oxygen – only several minutes can live. This substance finds broad application in the different fields of the industry, including chemical and also as a component of rocket fuel (oxidizer).

Everyone day of people are heard by a set of various terms and scientific definitions: in media, in a talk, at lectures... Often, turning to information a deaf ear, he does not think of their value. Speaking about ecology call it science "about environmental protection", but what sense should be put in this concept actually?