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According to the sources of the report of the United Nations (UN), Spain, with the lowest rate of fecundity in the world (1.07 children by woman in a fertile age), would have 30,226,000 inhabitants in 2050. That is less than the 39,628,000 it had in 2002, which had increased to 42,197,000 million in 2004 thanks to the increase of immigrants, which were more than 600,000 in 2003. In 2003, Spain took in one out of three people who immigrated to the European Union.

According to the division of population among the United Nations, the forecasts of population for the year 2050, comparing present population and the foreseeable one in 2050 by demographic zones, would be the following: Europe (present 727 million) anticipated for 2050, 603 million (-124 million); North America (present 314 million) anticipated for 2050, 438 (+124 million); South America (present 519 million) anticipated for 2050, 806 (+287 million); Africa (present 794 million) anticipated for the year 2050, 2 billion inhabitants (+1.206 million); Asia (present 3.7 billion) anticipated for the year 2005, 5.4 billion (+1.750 million).

The differences between the developed first world and the third world are evident, although these forecasts are exposed to many variations in such a big gap. For Spain, the population variations are of 39,600,000 inhabitants in 2000; 36,600,000 in 2025; and 30,200,000 in 2050. Spain, according to these forecasts, would need 12 million immigrants by 2050.

The variations of population between Europe and Africa are remarkable: after World War II, Europe represented 22% of the world-wide population and Africa only 8%. Now the two zones have the same proportion of 13%. Nevertheless, by the year 2050, Africa will be three times more populated than Europe. With reference to Spain, these data are significant: 50 years ago, Spain had a population three times bigger than Morocco; whereas within half a century, Morocco will have 60% more inhabitants than Spain.

Why be surprised then that half of the Arab adolescents wish to immigrate and leave their countries? Of the 2.8 billion inhabitants of the 22 African-Arab countries, 38% of the members of that population are less than 14-years-old. Morocco at the moment has about 30.5 million inhabitants, where 19% of the people are below the poverty threshold, occupying 123 rd position (of 173) in an Index of Human Development (Spain has 21 st ). Fifty percent are illiterate. The percentage of unemployment among Moroccans between the ages of 15 and 34 is that of 50%, and every year Morocco need to employ 250,000 new young people. The birth-rate is 3.05 children per woman, while Spain’s is 1.05 children per woman. There are 3 million Moroccans living away from their country; 300,000 of these immigrants are in Spain. Moroccans form the most numerous national group of foreigners in Spain, followed by the Latin Americans, who are driven to immigrate by the same structural factors previously mentioned: a globalized international market in capital, resources, and work; an unjust division between the North and South; a world-wide demographic imbalance and countries of origin with serious problems of poverty, political corruption, or citizen insecurity.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Immigration in the united states and spain: consideration for educational leaders. OpenStax CNX. Dec 20, 2009 Download for free at http://cnx.org/content/col11150/1.1
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