Freshwater use and conservation | Middle school Earth and space science | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Only about 2.5% of Earth's total water is freshwater, but it is essential for daily life, agriculture, and industry. Most freshwater is used to grow food, while growing populations and pollution put pressure on water availability. Because water resources be used faster than it can be replenished, conserving water and using it wisely helps protect this limited resource.
Sections:
00:00 Intro
00:40 How we use freshwater
01:51 Human impacts on freshwater
03:03 Desalination
03:31 How we can conserve freshwater
03:52 Summary
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Credits:
“A photograph of a Great Pyrenees and Australian Shepherd mix dog” by Wholthuijzen [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:GreatPyr02.jpg
“A photograph of a Great Pyrenees and Australian Shepherd mix dog” by Wholthuijzen [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:GreatPyr03.jpg
“De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium” by Trougnouf [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:De_Molen_(windmill)_and_the_nuclear_power_plant_cooling_tower_in_Doel,_Belgium_(DSCF3859).jpg
“Petroleum extraction in Chihuahuan Desert, Carlsbad, New Mexico, USA” by JYB Devot [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Petroleum_extraction_in_Chihuahuan_Desert_2248-2249mod.jpg
“Interprint Decor Paper, Production Arnsberg” by INPRG [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:IP_Production_Decor_Paper_Arnsberg_.jpg
“Human population since 1800 with projections of future population” by Bdm25 [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Human_population_since_1800.png
“A water faucet” by Temmydolph, licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
https://commons.wikimedia.org/wiki/File:A_water_faucet.jpg
https://creativecommons.org/licenses/by-sa/4.0/deed.en
“View of runoff of sediment from an agricultural field” by Natural Resources Conservation Service - New Mexico, U.S. Department of Agriculture [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Sediment_runoff_NRCS_2016a.jpg
“Desalination plant in RAK (Ras Al Khaimah, United Arab Emirates)” by Octal [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Desalination_plant_RAK.jpg
“A photograph of a Great Pyrenees and Australian Shepherd mix dog” by Wholthuijzen [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:GreatPyr01.jpg Receive SMS online on sms24.me
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