What happens if you cut down all of a city's trees? - Stefan Al

2,284,837 views ・ 2020-04-24

TED-Ed


Please double-click on the English subtitles below to play the video.

Prevodilac: Milenka Okuka Lektor: Ivana Krivokuća
00:07
This is the tale of two ancient cities
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Ovo je priča o dva drevna grada
00:10
and the trees that determined their destinies.
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i drveću koje je odredilo njihove sudbine.
00:14
In 3,000 BC Uruk was more densely populated than modern day New York City.
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Godine 3000 p.n.e, Uruk je bio gušće naseljen od današnjeg Njujorka.
00:19
This crowded capital had to continually expand their irrigation system
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Ovaj prenaseljeni glavni grad je morao stalno da širi svoj irigacioni sistem
00:24
to feed its growing population.
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kako bi prehranio rastuću populaciju.
00:26
2,500 years later in Sri Lanka, the city of Anuradhapura had a similar problem.
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U Šri Lanki, 2 500 godina kasnije, grad Anuradhapura je imao sličan problem.
00:33
They were also growing constantly,
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Takođe su stalno rasli
00:36
and like Uruk, their city relied heavily on an elaborate irrigation system.
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i, poput Uruka, njihov grad je prilično zavisio od složenog irigacionog sistema.
00:42
As Uruk grew, its farmers began chopping down trees to make space for more crops.
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Kako je Uruk rastao,
zemljoradnici su počeli da seku drveće kako bi bilo mesta za useve.
00:48
In Anuradhapura, however, trees were sacred.
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U Anuradhapuri, pak, drveće je bilo sveto.
00:51
Their city housed an offshoot of the Bodhi tree
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Njihov grad je bio domaćin izdanka drveta bodhi
00:54
under which Buddha himself was said to have attained enlightenment.
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pod kojim je, kako se verovalo, Buda lično dosegao prosvetljenje.
00:59
Religious reverence slowed farmer’s axes
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Religijsko obožavanje je usporavalo sekire zemljoradnika
01:02
and even led the city to plant additional trees in urban parks.
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i čak je navelo grad da posadi dodatno drveće u gradskim parkovima.
01:06
Initially, Uruk’s expansion worked well.
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U početku, širenje Uruka se odvijalo dobro.
01:10
But without trees to filter their water supply,
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Međutim, bez drveća koje bi prečišćavalo zalihe vode,
01:13
Uruk’s irrigation system became contaminated.
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Urukov irigacioni sistem je postao zagađen.
01:16
Evaporating water left mineral deposits,
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Vodena isparenja su ostavljala mineralne naslage
01:19
which rendered the soil too salty for agriculture.
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zbog kojih je zemljište bilo suviše slano za zemljoradnju.
01:23
Conversely, Anuradhapura’s irrigation system was designed to work
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Nasuprot tome, Anuradhapurin irigacioni sistem je osmišljen da bude
01:27
in concert with the surrounding forest.
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u sadejstvu sa okolnom šumom.
01:29
Their city eventually grew to more than twice Uruk’s population,
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Njihov grad je na kraju imao dvostruko više stanovnika od Uruka,
01:34
and today, Anuradhapura still cares for a tree planted over 2,000 years ago.
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a današnja Anuradhapura i dalje brine o drvetu posađenom pre 2 000 godina.
01:40
We may think of nature as being unconnected to our urban spaces,
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Možda smatramo kako priroda nije povezana sa našim urbanim prostorom,
01:44
but trees have always been an essential part of successful cities.
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ali drveće je oduvek bilo ključni deo uspešnih gradova.
01:49
Trees act like a natural sponge, absorbing storm water runoff
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Drveće deluje kao prirodni sunđer koji upija višak vode od olujnih kiša
01:53
before releasing it back into the atmosphere.
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pre nego što ga oslobodi nazad u atmosferu.
01:56
The webs of their roots protect against mudslides
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Mreža njihovog korenja štiti od blatnih odrona,
01:59
while allowing soil to retain water and filter out toxins.
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omogućujući tlu da zadrži vodu i prečisti toksine.
02:03
Roots help prevent floods,
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Korenje pomaže u sprečavanju poplava,
02:05
while reducing the need for storm drains and water treatment plants.
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umanjujući potrebu za olujnim slivnicima i fabrikama za prečišćavanje vode.
02:09
Their porous leaves purify the air by trapping carbon and other pollutants,
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Njihovo porozno lišće pročišćava vazduh hvatajući ugljenik i druge zagađivače,
02:14
making them essential in the fight against climate change.
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zbog čega je suštinski važno u borbi protiv klimatskih promena.
02:18
Humanity has been uncovering these arboreal benefits for centuries.
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Čovečanstvo je vekovima otkrivalo ove prednosti drveća.
02:23
But trees aren’t just crucial to the health of a city’s infrastructure;
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Međutim, drveće nije samo krucijalno za zdravlje gradske infrastrukture,
02:27
they play a vital role in the health of its citizens as well.
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ono igra ključnu ulogu za zdravlje gradskih stanovnika.
02:30
In the 1870’s, Manhattan had few trees outside the island’s parks.
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Tokom 1870-ih, Menhetn nije imao mnogo drveća izvan ostrvskih parkova.
02:36
Without trees to provide shade,
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Bez drveća koje bi pružalo hlad,
02:38
buildings absorbed up to nine times more solar radiation
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zgrade su upijale do devet puta više solarnog zračenja
02:42
during deadly summer heat waves.
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tokom smrtonosnih letnjih toplotnih udara.
02:44
Combined with the period’s poor sanitation standards,
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Uz loše sanitarne standarde tog perioda,
02:47
the oppressive heat made the city a breeding ground for bacteria like cholera.
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nepodnošljiva vrućina je pretvorila grad u leglo bakterija poput kolere.
02:53
In modern day Hong Kong, tall skyscrapers and underground infrastructure
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U savremenom Hong Kongu,
zbog visokih nebodera i podzemne infrastrukture
02:57
make it difficult for trees to grow.
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teško je drveću da raste.
03:00
This contributes to the city’s dangerously poor air quality,
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Ovo doprinosi kritično lošem kvalitetu vazduha u gradu
03:04
which can cause bronchitis and diminished lung function.
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koji može da uzrokuje bronhitis i smanjenu funkciju pluća.
03:07
Trees affect our mental health as well.
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Drveće utiče i na naše mentalno zdravlje.
03:10
Research indicates that the presence of green foliage increases attention spans
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Istraživanja pokazuju da prisustvo zelenila povećava raspon pažnje
03:15
and decreases stress levels.
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i umanjuje nivoe stresa.
03:17
It’s even been shown that hospital patients with views of brick walls
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Čak je pokazano da se bolnički pacijenti sa pogledom na zidove od cigli
03:22
recover more slowly than those with views of trees.
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sporije oporavljaju od onih sa pogledom na drveće.
03:26
Fortunately, many cities are full of views like this—
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Srećom, mnogi gradovi su puni sličnih prizora -
03:29
and that’s no accident.
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a to nije slučajno.
03:30
As early as the 18th century,
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Još u XVIII veku,
03:32
city planners began to embrace the importance of urban trees.
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gradski planeri su počeli da prihvataju važnost gradskog drveća.
03:37
In 1733, Colonel James Oglethorpe planned the city of Savannah, Georgia
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Godine 1733, pukovnik Džejms Ogletorp je uradio plan grada Savane u Džordžiji
03:43
to ensure that no neighborhood was more than a 2-minute walk from a park.
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kako bi se postarao da svaki komšiluk bude na najviše dva minuta hoda do parka.
03:48
After World War II, Copenhagen directed all new development along five arteries—
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Nakon Drugog svetskog rata,
Kopenhagen je pokrenuo potpuno novi razvoj grada duž pet arterija -
03:53
each sandwiched between a park.
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od kojih je svaka bila smeštena između parkova.
03:56
This layout increased the city’s resilience
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Ovakav nacrt je uvećao otpornost grada
03:58
to pollution and natural disasters.
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na zagađenje i prirodne katastrofe.
04:01
And urban trees don’t just benefit people.
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A gradsko drveće nije samo dobro za ljude.
04:04
Portland’s Forest Park preserves the region’s natural biodiversity,
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Portlandska park-šuma čuva prirodni biodiverzitet regije,
04:08
making the city home to various local plants,
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zbog čega je grad dom raznih lokalnih biljaka,
04:11
112 bird species, and 62 species of mammals.
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112 vrsta ptica i 62 vrste sisara.
04:16
No city is more committed to trees than Singapore.
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Nijedan grad nije posvećen drveću kao Singapur.
04:20
Since 1967, Singapore’s government has planted over 1.2 million trees,
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Od 1967. godine, singapurska vlada je posadila preko 1,2 miliona stabala,
04:26
including those within 50-meter tall vertical gardens called supertrees.
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kao i ono unutar vertikalnih bašti visokih 50 metara koje se nazivaju superdrvećem.
04:32
These structures sustain themselves and nearby conservatories
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Ove građevine snabdevaju sebe i obližnje konzervatorije
04:36
with solar energy and collected rainwater.
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solarnom energijom i sakupljenom kišnicom.
04:39
Trees and vegetation currently cover over 50% of Singapore’s landmass,
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Drveće i vegetacija trenutno pokrivaju 50% singapurske kopnene površine,
04:44
reducing the need for air conditioning
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umanjujući potrebu za klima-uređajima
04:46
and encouraging low-pollution transportation.
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i podstičući ekološki prevoz.
04:49
By 2050, it’s estimated that over 65% of the world will be living in cities.
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Procenjuje se da će do 2050. godine 65% sveta da živi u gradovima.
04:55
City planners can lay an eco-friendly foundation,
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Gradske arhitekte mogu da postave ekološke temelje,
04:58
but it’s up to the people who live in these urban forests
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ali je na ljudima koji žive u ovim urbanim džunglama
05:01
to make them homes for more than humans.
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da ih učine domovima i za druga bića osim ljudi.
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