Why Are 96,000,000 Black Balls on This Reservoir?

  • Ajoutée Il y a 7 mois

    VeritasiumVeritasium

    Durée: 12:07

    I took a boat through 96 million black plastic balls on the Los Angeles reservoir to find out why they're there. The first time I heard about shade balls the claim was they reduce evaporation. But it turns out this isn't the reason they were introduced.
    Huge thanks to LADWP for arranging this special tour for me. Next time let's put the GoPro on the submersible!
    The balls are made of high density polyethylene (HDPE) which is less dense than water so they float on the surface of the reservoir even if they break apart. They are 10cm (4 inches) in diameter and contain about 210ml of water. So the main reason they are on the reservoir is to block sunlight from entering the water and triggering a chemical reaction that turns harmless bromide into carcinogenic bromate. This effect occurs with prolonged exposure to bromate so regulators insist that levels be kept below 10 microgram per liter on average over a 12 month period.
    Special thanks to Patreon supporters:
    Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme and everyone who provided feedback on an early draft of this video.
    Thanks to:
    Las Virgenes Reservoir for footage of initial shade ball dump
    Euro-Matic for bird into jet-engine footage
    Researched and Produced by Casey Rentz
    Animations by Maria Raykova
    Music from epidemicsound.com "Colorful Animation 4" "Seaweed"
    And from Kevin MacLeod "Marty Gots a Plan"
    This is an educational video about the science of water quality.

Eric Maz
Eric Maz

were da fishes at

Il y a heure
papap aniop
papap aniop

It is eco .... really

Il y a 2 heures
Donna Dills
Donna Dills

5:50 the bird that flew in the engine

Il y a 5 heures
Mark Anthony
Mark Anthony

Не, в Украине такое не приживется: спиздят сразу!

Il y a 6 heures
K.D. Col
K.D. Col

They should do this is Las Vegas nevada ...

Il y a 7 heures
Laman Digital
Laman Digital

This thing gets recommended again..

Il y a 13 heures
MTHEGAMER Reacts
MTHEGAMER Reacts

Oh now black is good great

Il y a 15 heures
Blake Douglas
Blake Douglas

This isnt the only thing that's had 96 million black balls in it...

Il y a 18 heures
Sahil Chouhan
Sahil Chouhan

I am waiting for this video to get 96M views

Il y a 18 heures
Messias
Messias

Wenn eine Kugel durchschnittlich 30 Cent kosten dann sind das bei 96 Millionen 28800000 Euro,warum macht man das

Il y a 19 heures
Ashton Needler
Ashton Needler

moral of the story, drink well water.

Il y a jour
Ieuan Mills
Ieuan Mills

What happens during a hurricane? Balls everywhere

Il y a jour
james12
james12

how

Il y a jour
Arvindh Sarangapani
Arvindh Sarangapani

Sellur Raju fans hit like

Il y a jour
Dr IP
Dr IP

0:57 Bruh

Il y a jour
Jesse Mojica
Jesse Mojica

0:55 without any context is the most funny thing

Il y a 2 jours
Ahmed Alibaba
Ahmed Alibaba

Still here...

Il y a 2 jours
Shitty wolf
Shitty wolf

On 5:52 watch the bird close to airplane carefully Wtf!?!?!?

Il y a 2 jours
Survival Dad
Survival Dad

Because if the balls were white there would be riots on the streets and I would have to pay for something I didn't do.

Il y a 2 jours
Adomas B
Adomas B

well, you can call this body of water... the black sea

Il y a 2 jours
陳小哲
陳小哲

珍珠奶茶❤️❤️

Il y a 2 jours
Nationz YT
Nationz YT

*make it 95,999,999 because I ate one*

Il y a 2 jours
Ronit Tewary
Ronit Tewary

After few years you will get to know that whatever you were doing... its wrong Without sunlight water is dead Also you r messing with birds breeding

Il y a 2 jours
golden Freddy
golden Freddy

How they use white shade balls cuz White Sucks of radiation and that might last longer than black

Il y a 2 jours
Pumpkinseeds
Pumpkinseeds

Any one else notice the bird 5:52

Il y a 2 jours
Shooketh 7
Shooketh 7

*happy birthday raven!!*

Il y a 2 jours
Evuex r6
Evuex r6

0:55 I had so many questions like why are they black

Il y a 3 jours
LESTER WESTON
LESTER WESTON

more balls than in the house of congress

Il y a 3 jours
Vegan Caillou
Vegan Caillou

Me:reads the title THATS WHAT SHE SAID!!!

Il y a 3 jours
Andr0meda
Andr0meda

World's largest boba tea

Il y a 3 jours
DivineAlign8
DivineAlign8

Chemicals have to leach onto the water

Il y a 3 jours
KUARZOROSSO Children Educational Illustrated Books
KUARZOROSSO Children Educational Illustrated Books

This is why nothing is better than a ball shape... ask at millions of children and no so young why they expend so much time running behind one or throwing ... 😃🤓😉⚽️🎾🏀🏐🎱🥎🎧🧩🏁

Il y a 3 jours
王寒非
王寒非

Wont they kill the plants under water? Because of lack of light.

Il y a 3 jours
Munjee Syed
Munjee Syed

Why would you want plants growing in the water you drink ?

Il y a 2 jours
Slap my ass and call me Hillary Clinton
Slap my ass and call me Hillary Clinton

Who’s here after the sidemen video

Il y a 4 jours
mrwhiskers [gd]
mrwhiskers [gd]

glitch 15:54

Il y a 4 jours
mrwhiskers [gd]
mrwhiskers [gd]

5:51 poor bird turned to dust for some reason my dad laughed :(

Il y a 4 jours
quiotte2
quiotte2

kto od e-gitarzysty? :P

Il y a 4 jours
LPS HeartCake
LPS HeartCake

Cool 😎

Il y a 4 jours
Throne Frozen_
Throne Frozen_

Ezért fog a föld hamarosan kipusztulni... Ennyit költeni😂

Il y a 4 jours
100pie 0eater
100pie 0eater

5:50 bird get sucked by the jet engine

Il y a 4 jours

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