Linkhome Documentiportfolio Videovideo Fotohistory
»
S
O
C
I
A
L

B
A
R
«
La popolazione urbana: quali prospettive?

Nel 2008 è stato raggiunto un traguardo considerato storico da tutti coloro che si occupano di studiare i fenomeni demografici e urbani: per la prima volta la maggioranza della popolazione mondiale vive nelle città. Le previsioni indicano inoltre che la popolazione urbana è destinata ad aumentare ulteriormente raggiungendo il 60% della popolazione mondiale nel 2030, e il 70% nel 2050.

In altri termini le proiezioni realizzate dalle Nazioni Unite indicano che tra il 2007 e il 2050 la popolazione residente in città passerà da 3,3 miliardi a 6,4 miliardi, e che tale crescita sarà principalmente concentrata nelle città dei paesi in via di sviluppo. La percentuale di popolazione urbanizzata in questi paesi è oggi inferiore a quella dei paesi sviluppati, dove già nel 1950 più della metà della popolazione viveva in aree urbane, ma conosce una crescita molto rapida. Nei paesi più sviluppati infatti la popolazione urbana si è stabilizzata su un valore pari al 74%, con tassi di crescita pari allo 0,6%, mentre paesi come l’Africa, con un tasso di crescita pari al 3,4%, ed Asia, con un tasso di crescita pari al 2,6%, stanno vivendo cambiamenti demografici significativi: se oggi il 40% della popolazione di questi continenti vive in ambiente urbano, si prevede che nel 2030 la maggioranza della popolazione di queste regioni vivrà in città.

A cura di Alice Benessia, Maria Bucci, Simone Contu, Vincenzo Guarnieri.


35 interventi  
  • john ha scritto:
    25 ottobre 2014 alle 05:20

    Have you got any ? disabled accutane 20 mg comfortable vernon In an early sign of Republican opposition, RepresentativeJoe Barton of Texas told reporters: “No deal is better than abad deal,” as he downplayed the impact of an historic creditdefault if the U.S. limit on borrowing is not quickly raised.

  • Ariana ha scritto:
    25 ottobre 2014 alle 15:40

    I’ll call back later buy cheap cozaar Cyrille Urfer, head of asset allocation at Swiss bank Gonet,remained optimistic that politicians would reach a deal to raise the U.S. debt ceiling, which would in turn give anotherleg-up to European shares.

  • Blake ha scritto:
    25 ottobre 2014 alle 23:51

    Can I take your number? induced roused clomid 50mg successful pregnancy rye since The State Food and Drug Administration said the six-monthcampaign would also target illegal online drug sales and thesale of fake traditional Chinese medicine. It gave no details onpossible changes to regulation.

  • Chase ha scritto:
    26 ottobre 2014 alle 01:37

    Punk not dead pluck premarin price considerate “Operating income increased due to the impact of foreign exchange rates and our global efforts for profit improvement, through cost reduction activities such as companywide value analysis,” Takuo Sasak, chief marketing officer for Toyota, said in a statement,

  • Avery ha scritto:
    26 ottobre 2014 alle 09:49

    Do you need a work permit? doxycycline 50 mg A federal monitor, which I welcome to the conversation, is simply a temporary fix to a systemic problem. I can think of no stronger message we can send to the federal courts than taking the necessary steps to insure long-term safeguards such as the legislation that the City Council stands ready to implement. I am ever mindful that our court system has historically played a crucial role in the struggle for and protection of civil rights in our nation. Today is a new chapter in the struggle that continues.

  • Jake ha scritto:
    26 ottobre 2014 alle 17:21

    I’ve lost my bank card diflucan 50 mg capsule At euronews we believe in the intelligence of our viewers and we think that the mission of a news channel is to deliver facts without any opinion or bias, so that the viewers can form their own opinion on world events.

  • dirtbill ha scritto:
    26 ottobre 2014 alle 21:19

    What sort of work do you do? welfare diflucan cost without insurance organize descended The central bank has been forced to burn a hole in its reserves to defend the lira and last week raised its overnight lending rate to 7.25 percent from 6.5. The currency has dropped as much as 9 percent against the dollar over the past few months due to capital outflows.

  • Natalie ha scritto:
    27 ottobre 2014 alle 04:57

    Another year geodon 40 mg im Even as a 2008 real estate market crash and the euro zonecrisis crippled Spanish banks, BBVA resisted the temptation oftrimming its stake in CITIC Bank. But new regulations on capitalratios and offshore holdings have forced BBVA and others to sellstakes abroad and set aside more cash.

  • Kylie ha scritto:
    27 ottobre 2014 alle 12:13

    We need someone with experience buy albendazole without prescription “As the greatest society in the world, how we ended up in this position is beyond me,” Hale said. “But to put this burden on top working, loyal employees who are actually at the bottom of the food chain economically, it’s a travesty.”

  • Evan ha scritto:
    27 ottobre 2014 alle 18:12

    Could you ask him to call me? russell annoy cost of zetia girl going Beyond Florida, these states have some form of a stand-your-ground law, according to the national group: Alabama, Alaska, Arizona, Georgia, Indiana, Kansas, Kentucky, Louisiana, Michigan, Mississippi, Montana, Nevada, New Hampshire, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Utah and West Virginia.

  • Haley ha scritto:
    28 ottobre 2014 alle 00:55

    I’m not interested in football buy levaquin 500 mg On Wall Street, stocks have come under pressure as corporaterevenue growth has disappointed even as companies’ earnings havehit estimates. From Wal-Mart and Gap to Macy’s and McDonald’s, chains that cater to middle- andlower-income Americans are feeling the pinch of an uneveneconomic recovery.

  • Tyler ha scritto:
    28 ottobre 2014 alle 20:04

    Can I take your number? atorvastatin tablets ip 10 mg Villagrana originally faced up to life in prison on second-degree murder and other charges for shooting a Vagos member in the leg. The incident happened Sept. 23, 2011, the same night the president of the Hells Angels’ San Jose chapter, Jeffrey “Jethro” Pettigrew, was shot dead at John Ascuaga’s Nugget in Sparks.

  • Victoria ha scritto:
    29 ottobre 2014 alle 14:53

    I’m self-employed atorvastatin price sams club On the trains, Southeastern services have speed restrictions at New Cross and subsequent congestion on the line means trains coming into London Bridge, Charing Cross and Cannon Street are delayed by 15 minutes.

  • Brandon ha scritto:
    30 ottobre 2014 alle 10:10

    Which team do you support? neurontin 600 mg pain Booker, the charismatic mayor of Newark, faces conservative activist Steve Lonegan in the Oct. 16 special election to finish the term of Frank Lautenberg, who died in June. While Booker is still considered a heavy favorite, a 35-point lead he held just two months ago has dwindled to 12 points, according to recent polls. Political observers say it is common for a race to tighten as election day approaches, but that doesn’t completely explain a Tea Party favorite closing the gap on Booker in a state that voted overwhelmingly for President Obama.

  • Bryan ha scritto:
    31 ottobre 2014 alle 05:21

    What’s the current interest rate for personal loans? provera online Really, if you had to guess before the season which of the New York teams would be 0-6 and which would be trying to make a case that they had a playoff run in them, there’s no doubt how that would have come out.


Intervieni

Se vuoi inserire un video nel tuo intervento copia il link youtube e sostituisci http con httpv (attenzione alla 'v'!)

Powered by PerformingMediaLab/Pie