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Découvrez comment l'évolution d'un ancien lac en un désert récent soulève des questions sur l'environnement et ses impacts à long terme. Apprenez comment des tempêtes de poussière peuvent transporter des particules toxiques sur de longues distances, affectant la nature et la vie quotidienne de millions de personnes. Explorez avec nous cette transformation étonnante et ses enjeux futurs.

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00:00In 1960, we could fish here.
00:04Today, the boats are on the sable,
00:07at more than 100km of the water.
00:10The mer d'Aral a sea,
00:12and it was not an accident.
00:16The summer of 2026 could bring
00:1810 to 12 huge storms of toxic toxic
00:22of the Aralcoum.
00:23Maybe the worst season of the storm, Conny.
00:26And it could touch millions of inhabitants of the region.
00:32The Aral was the fourth lake of the world.
00:35At present, it almost disappeared.
00:39The Aral is between Kazakhstan and Uzbekistan.
00:43Malgré son nom,
00:45it was a sea lake,
00:47with the ocean.
00:50Two big rivers,
00:51the Amudaria and the Sirdaria,
00:53the Alimenter for thousands of years.
00:57Jusqu'aux années 1960,
00:59when we destroyed the seas of the seas
01:01to cultivate the desert.
01:04Especially the cotton.
01:06The big boats destroyed the seas.
01:08And all this water had no time to reach the lake.
01:12The mer d'Aral started to get very quickly.
01:16Moins of water arrived,
01:17plus the river reculated.
01:22In the sea,
01:28the mer d'Aral
01:29has lost nearly 90% of its size.
01:34But the worst was ailleurs.
01:36The sea lake became a new desert,
01:39the Aralcoum.
01:41Today,
01:43it covers about 62 000 km.
01:46It's about the size
01:47of the Virginian Occidental.
01:50The wind blew the sea sec
01:52and unleashed the sea and sable.
01:55These sea portent
01:56the water,
01:57the water,
01:58the water,
01:59the fields and farms.
02:02The air has impacted,
02:04the cultures mourned
02:05and the inhabitants have begun
02:06to suffer severe problems
02:08of health.
02:10Today,
02:11we're trying to slow down this catastrophe.
02:14One idea,
02:15plant it
02:15on the ground
02:16on the ground
02:17on the ground.
02:20These plants
02:21do the desert help
02:22to fix the soil,
02:23so the wind
02:24makes it less easily.
02:26Unfortunately,
02:27it will not make it
02:28the mer d'Aral.
02:30But it will be a slowdown.
02:34The new image
02:35satellite
02:36of the European Space Agency
02:37show how much
02:39the damage
02:39are extreme.
02:40In the middle of the landscape,
02:42there is a big void
02:44in the place of the lake.
02:46The images of March 2025
02:48show the west of the lake
02:50very low,
02:52and that the part
02:53is almost entirely disappeared.
02:57In the middle of the lake,
02:58only a little bit
02:58of the lake
02:59is still alive.
03:01It is the
03:01Little Mer
03:02of Aral,
03:03in Kazakhstan.
03:04In the summer,
03:05there are even zones
03:06as well.
03:07And the south
03:08could soon disappear.
03:09The Little Mer
03:11of Aral
03:12could still be saved.
03:14A big project
03:16is the bridge
03:16Coccarral.
03:18In the sky,
03:19it forms
03:19two trees
03:20brun
03:20to the south-est
03:21of the Little Aral.
03:25The bridge
03:26was finished in 2005,
03:28and its role
03:29is simple.
03:30To prevent
03:31the water
03:31from the south
03:32and keep it
03:33in the north part
03:34of the north.
03:36Surprise!
03:37This plan
03:38has better worked
03:40since the bridge.
03:43the Aral
03:43has gained
03:44about 4 mètres
03:45of the water.
03:47The sea has been
03:48down.
03:49The poissons
03:50have begun
03:50to come back.
03:52Some villages
03:53of fishing
03:54revives.
03:56They are
03:57far away
03:57from the big lake
03:58past.
03:59The drama
04:00of the Aral
04:01is one of the worst
04:02ecological disasters.
04:04In the south,
04:06the historical
04:06historic
04:07has suffered a lot.
04:09It was a rich
04:11region,
04:11rivers,
04:13rivers,
04:14rivers,
04:14forests
04:14and fish.
04:16Today,
04:17the vastes
04:18areas seem
04:18post-apocalyptic.
04:21When the
04:22toxic pollution
04:23has touched
04:23the land,
04:24the land
04:27has fallen
04:27in crisis.
04:29A lot
04:29of the land
04:30has fallen
04:30and nothing
04:31has been
04:31toxic.
04:34thousands
04:35of
04:36thousands
04:36have lost
04:37their principal
04:38income.
04:39The
04:39water
04:40is
04:40rare.
04:41And
04:42the
04:42most
04:43respiratory
04:45and
04:46anemia.
04:48The
04:49lake
04:49has fallen
04:50in the
04:50sea.
04:52The
04:53forest
04:53has fallen
04:54very
04:56quickly.
04:58In
04:58a few
04:59decades,
05:00we have almost
05:00to have
05:00to have
05:00to have
05:01the
05:02economy
05:05and the
05:06health
05:07of a vast
05:07region.
05:08we try
05:10to save
05:10what is
05:10left.
05:12There are
05:12big
05:13economic projects,
05:14and even
05:16plans
05:17liés
05:17to
05:18the
05:18tech.
05:21We want to
05:23create
05:23data
05:23and
05:24Centria.
05:27But
05:28hard
05:28to imagine.
05:30The
05:30region
05:31lacks
05:31water
05:32and
05:32even
05:33some
05:34projects
05:36seem
05:37much
05:37more
05:38realist.
05:39A
05:40program
05:40helps
05:41farmers
05:41to
05:42cultivate
05:42a
05:42less
05:43gourmet
05:43in
05:43water.
05:45It's
05:48interesting,
05:52it's not
05:53the same
05:54face
05:54everywhere.
05:56Most
05:57reports
05:58are
05:58just
05:59near
06:00near
06:00the
06:00or
06:01a
06:01sea
06:01wet
06:01it.
06:04to
06:04a
06:04sea
06:06more
06:07south
06:09do
06:10more
06:19than
06:20reached
06:22sea
06:23near
06:23sea
06:25sea
06:25The satellite shows less of the abandoned champs.
06:28But it doesn't mean that these regions are at the end.
06:31Poussière, lack of water, and ecologists touch the whole area.
06:37The strong tempest hit the Karakal Paxton, the Korezme and Dachogouz in the same time.
06:44They are brief and the fight is not finished.
06:47The mer d'Aral du Nord, in Kazakhstan,
06:50the part revenu grâce au barrage de Kokaral subit de nouveau une forte pression.
06:57L'eau qui arrive par le Cirdaria
07:00pourrait devenir trop faible pour compenser l'intense évaporation estivale.
07:05Le niveau de l'eau pourrait chuter fortement durant l'été 2026.
07:09Si ça arrive, l'eau sera plus salée
07:13et les populations de poissons seront encore frappées.
07:17Hélas, le drame de l'Aral n'est pas unique.
07:21Beaucoup d'autres lacs et réservoirs dans le monde
07:23souffrent de surexploitation et d'une mauvaise gestion de l'eau.
07:28Prenez le lac Tchad, en Afrique.
07:31Dans les années 60, c'était l'un des plus grands lacs du continent.
07:35Aujourd'hui, 90% ont disparu.
07:39Voilà l'effet d'années de sécheresse, de chaleur
07:42et d'eau pompée pour les cultures sur ce lac.
07:47Pire, quand l'eau a disparu, des millions ont perdu leur travail de pêche.
07:52Leur terre et l'eau potable.
07:55Cela a causé faim et maladie.
07:57Beaucoup de gens ont dû partir.
08:01Maintenant, regardons les États-Unis.
08:03Le lac Mead, ce grand réservoir derrière le barrage Hoover, près du Nevada et de l'Arizona, baisse depuis des
08:10années.
08:11À cause d'une très longue sécheresse et d'une énorme pression sur le fleuve Colorado.
08:18Parfois, l'eau était si basse qu'on craignait de perdre l'électricité du barrage.
08:23Et même à se demander si les grandes villes auraient encore assez d'eau.
08:28À la différence d'ailleurs, une partie du sud-ouest américain a réagi vite, comme Las Vegas.
08:34La ville a grandi vite, mais depuis 2000, l'eau par habitant a presque été divisée par deux.
08:42Son bref, une grande raison, les gens ont remplacé les grandes pelouses par des plantes du désert, bien moins gourmande
08:50en eau.
08:51La ville a aussi creusé des prises d'eau profondes.
08:55Ainsi, elle pompait encore dans le lac Mead, même à un niveau très bas.
09:02Il y a aussi la Salton Sea.
09:05Son histoire rappelle trop la mer d'Aral.
09:10La Salton Sea est un immense lac intérieur du site de la Californie.
09:15Des décennies durant, l'eau des fermes la nourrit.
09:18Plus le niveau a baissé, et de grands pans du fond ont séché.
09:23Exposant 1, sol toxique.
09:26Le vent pousse vers les villes.
09:28Une poussière pleine de métaux lourds et de produits chimiques, causant des maladies cardio-pulmonaires.
09:34Dans des villes, les gens respirent littéralement la poussière toxique du fond asséché du lac.
09:40La Californie a déjà lancé de grands projets de nettoyage et antipoussières,
09:45dont des zones humides et des sols stabilisés.
09:49Mais beaucoup d'experts disent qu'il est peut-être déjà trop tard.
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