The atmosphere is the layer of air (gaseous envelope) that surrounds the earth.
Most of the air is located in the lower layers of the atmosphere.
Changes in air composition can be affected by emissions or sources that are divided into three major groups.


1. The first group of emissions are emissions that were not caused by human activity, such as volcanoes, oceans, storms, etc.
    These are called natural emissions.

2. Emissions which in nature are wholly or partly caused by human action.
    They are common in agriculture (cattle breeding) or are the result of fires caused by deforestation.

3. And the last, third group of emissions were created by direct human action and are called anthropogenic emissions.
    These are, for example, emissions caused by the processing or use of chemical substances, the burning of fossil fuels, those that occur for the purpose of obtaining energy,
    and the like.
Those emissions that are created by the action of nature are everyday and last from the time of the formation of our planet.
These natural emissions greatly affect the chemical composition of the atmosphere, but man cannot influence them.
For example, many active volcanoes on Earth are constantly emitting gases such as sulfur, hydrogen, flour and the like.
Volcanic eruptions also release various radioactive substances.

The greatest air pollution is caused by man, by burning fossil fuels.
Combustion products are very dangerous gases (sulfur dioxide, ammonia, carbon dioxide) that pollute the air and that can combine with rain and cause acid rain.
Among the major air pollutants are freons (the name for gases) which are released into the atmosphere and cause it to heat up and destroy the ozone layer that protects the Earth from the penetration of UV rays.
Air protection measures have existed for centuries, but have only been seriously implemented in the last few decades.


One hundred years ago, waste gases were not purified.
Chimneys at the time had the sole purpose of exhausting gases and providing enough air for combustion.
Numerous measurements of air quality in the last thirty years, when deforestation has been observed, have led to increased awareness of pollution prevention by reducing overall chimneys, catalysts are installed in vehicles, global conferences are held to protect the Earth and its environment.



How do you think we, as humans, can help with air pollution, how can we prevent or reduce it?