The majority of people like to live in the city. Inhabitants of 90% of the different countries of the world prefer to live in the big capitals, this has generated an accelerated increase in the construction of new urbanisms to the point that it is foreseen that by 2050 two thirds of the world population will live in fully urbanized cities. For some people, and especially at an economic level, the construction and real estate industry appears to be one of the most solid and most likely to grow from now on. However, this has consequences that go beyond the economy and these are the ones that can be seen in the environment and very especially in biodiversity where the consequences are really negative.

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In the midst of this process of urbanizing and even overpopulating spaces, nature and all life in it suffers. When hectares of forest are cut down, when fields are paved to make roads, rivers are diverted and barriers are put to the sea; we are irreparably altering the planet and with it the ecosystems. Among the consequences to biodiversity we have:

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1.- Large urban developments end up with the home of thousands of species and there are very few that can survive in coexistence with people and all the pollution they generate.

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2.- The problems of air and water pollution, especially the water generated from the treatment of sewage becomes one of the first sources of poisoning of lakes and rivers that are in areas near the urban developments and kill the species that live there.

3.- The fauna is contaminated by toxic substances that are a product of people's economic activities or daily life.

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4.- The displacement of species from their habitats for the construction of housing and other urban development. This generates a disaster at the level of natural balance, because there are species that need to be in areas or spaces separated from others for different reasons and they do this naturally. When they are displaced, species are forced to coexist in reduced spaces where the selection and survival will be that of the strongest species, which brings about extinction.

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Currently there is talk of a concept that links urbanization with biodiversity and it is about urban biodiversity, from my point of view there is still much to review, but so far I do not see possible the harmonious coexistence of both terms. In another article we will analyze if it is possible to urbanize while respecting biodiversity. Thank you for reading my post, if you like you can comment on the consequences of urbanization and overpopulation of natural spaces?