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Federal state
A federal state is a system of government in which power is divided...

Marxism
Marxism or scientific socialism is a political, social and economic...

Air pollution
Air pollution occurs when a series of toxic gases come into direct contact...

Atmospheric pollution
Atmospheric pollution means the presence of impurities or the increase of...

Soil pollution
Soil pollution is when it contains an abnormal concentration of...

Water pollution
Water pollution is any type of chemical, physical or biological change in the...

Light pollution
Light pollution is any kind of negative effect on the environment caused by...

Noise pollution
Noise pollution is the excess of sound that negatively affects the...

Autocracy
Autocracy is the type of government in which power is concentrated in a...

Oligarchy
The oligarchy is a form of government in which power is exercised by a...

Plutocracy
A plutocracy is the form of government that develops at the moment when the...

Capitalism
Capitalism is an economic and social system based on the fact...