owadays, large cities are becoming more and more inhabited because of the tendency of the immigration to the city. Even though, it brings about many advantages such as more opportunities of jobs and higher living standard, the urban lifestyle make rural dwellers opt to live a different lifestyle than before. Living in a big city may result in many drawbacks as discussed following.

Urban centers are filled with motorized transport and other sources of pollutants like waste from the large populations of people, or emissions from factories. The urban centers have very few or even totally missing green spaces with higher amount of pollutants that are so harmful for citizens. For a long time, lung cancers, chronic obstructive pulmonary diseases and asthma are just a few diseases common among urban dwellers.

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