Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)

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Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)

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)

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)

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%

Page 3: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)

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)

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)

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)

Types of Water Pollution

Disease organismsWastes that remove oxygen from waterInorganic chemicalsOrganic chemicalsPlant fertilizerSedimentRadioactive substances

Page 7: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)

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)

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)

Air Pollution

What is the major source of air pollution?◦Fossil fuel combustion (transportation)

Page 10: Water, Air, & Land Resources Section 4.3 in textbook (pp. 108 – 112)

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