Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)
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Transcript of Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)
![Page 1: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/1.jpg)
Water, Air, & Land Resources
Section 4.3 in textbook (pp. 108 – 112)
![Page 2: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/2.jpg)
The Water Planet
About 71% of Earth’s surface is covered by water.
What percent of water on the planet is usable fresh water?◦Less than 1%
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Freshwater Pollution
Point Source Pollution: pollution that comes from a known and specific location◦Example of Point Source Pollution:
Leaking landfill or storage tank
![Page 4: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/4.jpg)
Freshwater Pollution
Nonpoint Source Pollution: pollution that does not have a specific point of origin
Example of Nonpoint Source Pollution:◦runoff
![Page 5: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/5.jpg)
Freshwater Pollution
Runoff: water that flows over the land rather than seeping into the ground
![Page 6: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/6.jpg)
Types of Water Pollution
Disease organismsWastes that remove oxygen from waterInorganic chemicalsOrganic chemicalsPlant fertilizerSedimentRadioactive substances
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Air Pollution - Ozone
What is ozone?◦O3, three oxygen atoms bonded together
How does it help the Earth?◦Shields Earth from 95% of the Sun’s harmful UV (ultraviolet) radiation
![Page 8: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/8.jpg)
Air Pollution – Greenhouse Gases
What are they?◦Carbon dioxide, methane, water vapor
Why are they necessary?◦Absorb the heat that Earth emits, keeping the atmosphere warm enough to sustain life
![Page 9: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)](https://reader035.fdocuments.net/reader035/viewer/2022072006/56649cfa5503460f949cb98b/html5/thumbnails/9.jpg)
Air Pollution
What is the major source of air pollution?◦Fossil fuel combustion (transportation)
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Land Resources
Why are mines necessary?◦They produce many of mineral resources we need.
What is a drawback of mining?◦Tears up Earth’s surface, destroys vegetation, soil erosion, create pollution
How can agriculture cause damage to land resources?◦Groundwater depletion due to extensive irrigation