Shared May 10, 2019
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.
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 http://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.
ARROWS vs ARMOUR - Medieval Myth Busting
World's Funniest Engineering Fails
Hoover Dam Will Be A Dead Cesspool By 2021 - The Coming Disaster Is Real
Things You're Consuming Wrong
My Fire Ants Are Planning an Escape
After Lakes Were Drained At A British Palace, It Revealed An Astonishing Network Of Secret Rooms
Woman Wears $13 Ring For 30 Years, Looks Again And Realizes She’s A Millionaire
What's The Largest Thing To Ever Live On Earth? DEBUNKED
Control line tragedy
Interstellar Travel: Approaching Light Speed
INTERESTING ROAD INVENTIONS THAT ARE ON AN ENTIRELY NEW LEVEL
In Saudi Arabia, you will not believe how potatoes are grown.
Gordon Ramsay Cooks Shrimp Scampi In Just 10 Minutes | Ramsay in 10
17 Most Unreal Rock Formations
World's Lightest Solid!
Does Planet 9 Exist?
35 CEMENT IDEAS THAT ARE SO EASY
This is How They Built the Inca Stone Walls | Ancient Architects