The introduction of new, non-essential, physical, chemical and biological elements into any environment or the increase in the number of such elements in the environment is called pollution. Pollution sources of the atmosphere: volcanic eruptions, dispersive particles that come from the sun, forest fires, acid rains, electric stations, industrial enterprises and factories, and electromagnetic pollution. Although the atmosphere's natural pollution is tragic, man-made pollution is more dangerous for the living world. Global issues are changing globally by the presence of gases and dust in the atmosphere. The first of these events is the "heat" effect. Some of the anthropogenic waste (carbon dioxide - CO2, methane -CH4, nitrogen oxide -NO2, etc.) prevents heat sinking from the ground from scattering it into the atmosphere. This leads to a temperature rise on the surface of the earth. Forecasts suggest that the double increase of carbon dioxide content in the atmosphere can increase the temperature on the Earth by 1.5-3 degrees.

The above-mentioned acid rains are one of the problems that arise from manufactured pollution of the environment. The result of another pollution problem is smog. It mainly occurs from the smoke of cars and factories in large industrial cities. The smog is one of the most considerable insecurities to humanity. 

The third case of the drawback is drought. This phenomenon is related to the increase in the temperature of the Earth's surface as a result of increased carbon dioxide concentration in the plains between the mountains. As you can see, the anthropogenic waste thrown into the atmosphere plays an essential role in disrupting the ecological balance as a whole.

WORLDWIDE AIR POLLUTION STATISTICS:

• ·         About 7 million people die each year from air pollution.
• ·         Air pollution has killed 4.2 million people in the world in 2016.
• ·         91% of the world's population breathe air does not meet the World Health Organization's air cleanliness standards.
• ·         Out of 20 polluted cities in the world, 14 are located in India. The first place in the list is the city of Kanpur, north of India.
• ·         In the world, 9 out of every 10 people are breathing in dirty air.

One of the 8 global deaths is related to air pollution, which turns it into "the world's only dangerous health hazard," -the World Health Organization.

Additionally, according to a study conducted in China, people's ability to detect inhaled air can be weakened for a long time. Researchers believe that the adverse effects of air pollution are aggravated as age increases, and the negative effects of polluting air can be stronger for older men with low education and enlightenment. The study was conducted on the basis of collaboration between Beijing University and Yale University in the United States of America and investigated the effects of particles in sulfur dioxide, nitrogen dioxide and particles less than 10 micrometers in the human brain.