Environment - a set of components of the environment, natural and man-made natural objects and man-made objects.
Components of the environment - land, minerals, soils, surface and ground water, air, flora, fauna and other organisms, as well as the ozone layer of the atmosphere and near-Earth space, providing a set of favorable conditions for the existence of life on Earth.
Pollution - into the environment of matter and (or) energy, property, location or number of which have a negative impact on the environment.
Contaminant - a substance or mixture of substances, the number and (or) concentrations exceed established for chemical substances, including radioactive and other substances and microorganisms standards and have a negative impact on the environment.
Air pollution - a really serious problem. Air is composed of oxygen, nitrogen, water vapor, and, thanks to our civilization, of a variety of toxic particles. The more of these particles in the air is, the less room is left in the atmosphere for oxygen.
The problem of air pollution is not limited to the space outside. The air inside our homes and offices can be as dangerous to your health. The main source of pollution - cigarette smoke, but it is not the only one. Toxins are allocated even when you just cook. Every time you scratch the Teflon non-stick coating is allocated enough toxins to kill a canary.
Greenhouse effect, which we all have been associated with the phenomenon of global warming, caused by toxic gases. The main enemy of clear atmosphere - methane. It is released from the decomposition of sewage.
Greatly affects our waterways. In every neighborhood, in every city there drain sewer, storm water from the highways and municipal enterprises directly into the river. Everything goes into the water, passing minor cleaning steps.
The arms, close to the modern form, appeared in the Middle ages in Western Europe, in England and France. The first flag is a shield with six gold lions in the azure field, which, according to the contested today version, Geoffroy V of Anjou received in 1127 or 1128 from his father, the king of England Henry I, on the occasion of his marriage to his daughter Matilda, widow of Emperor Henry V.
The proliferation of arms associated with the flowering of military equipment, especially with the advent of the helmet covering the faces of the warriors. The coat of arms was depicted with bright colors on the shield. Along with the helmet played an important identification task.
The Alans and the Turkic peoples tribal marks existed in the form of tamgas, which were assigned to each aristocratic surnames (for example in Ossetian aristocracy).
Emblems can be systematized on accessory, ranks, images, legal status, styles.