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Incalzirea globala


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#1 jet li

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Scris 03 February 2007 - 03:19 AM

Se poate opri incalzirea globala - dar nu o sa incercam niciodata cu adevarat
1 grad in plus nu pare mult, dar e foarte mult pentru ca e vorba de medie. Temperatura medie a crescut cu 1 grad in ultima suta de ani. Efectele se vad deja. Uitati aici ce se intampla daca se adauga grade la media asta :


+2.4°: Coral reefs almost extinct

In North America, a new dust-bowl brings deserts to life in the high plains states, centred on Nebraska, but also wipes out agriculture and

cattle ranching as sand dunes appear across five US states, from Texas in the south to Montana in the north.

Rising sea levels accelerate as the Greenland ice sheet tips into irreversible melt, submerging atoll nations and low-lying deltas. In Peru, disappearing Andean glaciers mean 10 million people face water shortages. Warming seas wipe out the Great Barrier Reef and make coral reefs virtually extinct throughout the tropics. Worldwide, a third of all species on the planet face extinction

+3.4°: Rainforest turns to desert

The Amazonian rainforest burns in a firestorm of catastrophic ferocity, covering South America with ash and smoke. Once the smoke clears, the interior of Brazil has become desert, and huge amounts of extra carbon have entered the atmosphere, further boosting global warming. The entire Arctic ice-cap disappears in the summer months, leaving the North Pole ice-free for the first time in 3 million years. Polar bears, walruses and ringed seals all go extinct. Water supplies run short in California as the Sierra Nevada snowpack melts away. Tens of millions are displaced as the Kalahari desert expands across southern Africa

+4.4°: Melting ice caps displace millions

Rapidly-rising temperatures in the Arctic put Siberian permafrost in the melt zone, releasing vast quantities of methane and CO2. Global temperatures keep on rising rapidly in consequence. Melting ice-caps and sea level rises displace more than 100 million people, particularly in Bangladesh, the Nile Delta and Shanghai. Heatwaves and drought make much of the sub-tropics uninhabitable: large-scale migration even takes place within Europe, where deserts are growing in southern Spain, Italy and Greece. More than half of wild species are wiped out, in the worst mass extinction since the end of the dinosaurs. Agriculture collapses in Australia

+5.4°: Sea levels rise by five metres

The West Antarctic ice sheet breaks up, eventually adding another five metres to global sea levels. If these temperatures are sustained, the entire planet will become ice-free, and sea levels will be 70 metres higher than today. South Asian society collapses due to the disappearance of glaciers in the Himalayas, drying up the Indus river, while in east India and Bangladesh, monsoon floods threaten millions. Super-El Niños spark global weather chaos. Most of humanity begins to seek refuge away from higher temperatures closer to the poles. Tens of millions of refugees force their way into Scandanavia and the British Isles. World food supplies run out

+6.4°: Most of life is exterminated

Warming seas lead to the possible release of methane hydrates trapped in sub-oceanic sediments: methane fireballs tear across the sky, causing further warming. The oceans lose their oxygen and turn stagnant, releasing poisonous hydrogen sulphide gas and destroying the ozone layer. Deserts extend almost to the Arctic. "Hypercanes" (hurricanes of unimaginable ferocity) circumnavigate the globe, causing flash floods which strip the land of soil. Humanity reduced to a few survivors eking out a living in polar refuges. Most of life on Earth has been snuffed out, as temperatures rise higher than for hundreds of millions of years.


http://news.independ...icle2211566.ece


- desertificare in Tibet

http://www.youtube.c...0...ted&search= - Amazonul a inceput sa sece
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Ultima colectie! Noile implanturi Allergan BRST

#2 jet li

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Scris 03 February 2007 - 11:24 AM

Temperatura a variat in timp cea ce a cauzat erele glaciare. Aici poze cu variatia CO2 si variatia temperaturii din ultimii 650000 ani - aflate prin studii pe gheata din Antarctica. Graficul cu CO2 si temperatura, varia foarte frumos si constant Acum suntem deasupra oricarui grafic

http://en.wikipedia....rature-plot.svg
http://en.wikipedia...._Comparison.png
http://en.wikipedia....de_400kyr-2.png

http://www.youtube.c...A...ted&search= - Padurea din Amazon arde. 600 de focuri noi in fiecare zi - provocate de om pentru a face loc pentru agricultura sau naturale


http://www.youtube.c...8...ted&search= - Seceta in Asia de Sud Est


- ghetarii din Peru dispar, probleme cu apa potabila.
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#3 DarkBringer

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Scris 03 February 2007 - 11:48 AM

Oricum ii doare undeva pe toti, doar nu putem sa fim atat de naivi incat sa credem ca guvernele tarilor puternice vor incerca sa faca ceva? Nici daca ar sti sigur ca peste 50 de ani ne v-a inghiti pamantul. In raportul de la Paris spuneau ca 90% din totalul acestor efecte se datoreaza omului....mai avem sa ne dam foc ca sa sterilizam bine pamantul^^
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#4 dAImon

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Scris 03 February 2007 - 11:56 AM

Discuţiile se axează în principal pe următoarea dilemă : să ne meargă bine nouă, sau copiilor noştri? A pune mâna să facem ceva ar însemna să strângem noi cureaua, chiar metaforic vorbind. Ceea ce nu vom vedea prea curând.

Iată, ţările bogate îşi permit luxul de a instala filtre industriale şi de a cere şi cetăţenilor să reducă poluarea (filtre pe maşini, etc etc). Însă aceste ţări reprezintă un procentaj infim din populaţia planetei. Unde sunt ţările în curs de dezvoltare, unde sunt cele ale lumii a treia? Aceştia se străduiesc să supravieţuiască în condiţii decente, fix de nivelul poluării nu le mai pasă în momentul de faţă. Jet Li, dacă găseşti, ataşează un documentar despre locurile unde se elimină noxe pe planetă. Să ne lămurim şi noi :aranjare:
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#5 jet li

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Scris 03 February 2007 - 03:07 PM

http://upload.wikime...eobfuscated.png

http://en.wikipedia....i/CO2_emissions - aici e lista cu tari care produc cel mai mult CO2. Pe primele locuri sunt USA si China. Degeaba luam masini care consuma mai putina benzina, tot producem CO2 doar prelungim timpul in care il producem
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#6 jet li

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Scris 03 February 2007 - 04:12 PM

http://www.thewe.cc/...es_grandma.html
Ce credeti ca s-a intamplat cu gaura din stratul de ozon ? Am oprit folosirea freonului si gata a disparut ? Nu e la locul ei si mai mare ca oricand. Padurea mentine stratul de ozon, nu faptul ca nu folosim noi freon, si padurea e pe cale de disparitie , mai ales padurea tropicala din Amazon - cea ce eu am invatat la scoala ca se numeste "plamanul planetei"

The 2006 ozone hole area has become more depleted in the late Austral winter than an all time record of 28 million square kilometres reached in 2000.


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#7 ActorGrabit

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Scris 05 February 2007 - 12:32 AM

Interesant subiect. Incalzirea globala e un fenomen din ce in ce mai grav, asa ca eu as propune sa gandim un topic mult mai original si mai socant pe aceasta tema. Inca nu m-am gandit exact la ce si cum anume, dar daca exista bunavointa pe forum.. Chiar daca suntem o mana de oameni, forumul Roportal prezinta un avantaj: apare in top la search pe GooGle :focus:
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#8 empor

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Scris 07 February 2007 - 03:30 PM

Uite ce zice George Carlin despre asta :


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#9 samsara

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Scris 07 February 2007 - 03:42 PM

Global Dimming - Tragic End of Humanity - BBC Documentary (2005)

Este un filmulet tare interesant despre incalzirea globala si scaderea intensitatii luminii solare!
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