Environment and Natural Resources (Global Connections), 1st by Charles F. Gritzner

By Charles F. Gritzner

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Extra info for Environment and Natural Resources (Global Connections), 1st Edition

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Tropical soils that formed in place are notoriously infertile. Because of the high amounts of rainfall, they have been leached of nearly all of their nutrients. But periodic flooding and deposition of silt, as in the ancient Nile Valley, renews the fertility of alluvial soils. Land-Caused Environmental Hazards Some of the world’s greatest disasters have been caused by earthquakes, volcanic eruptions, and landslides. Additionally, tsunamis can be caused by any of the foregoing events if they occur on the ocean floor.

It is what contributes to the humus (decomposed organic matter) contained within a soil type. Some of the world’s richest soil formed beneath a grassland cover. The sod (thickly matted roots of grasses) added valuable nutrients to the upper layers of soil. ” They include the interior plains of North America, the Pampas of Argentina, and the Black Earth Belt of interior Eurasia. No doubt you have always heard that erosion is very bad, particularly for farming. ” Many of the world’s most fertile agricultural lands are in river valleys and coastal plains.

In some cases, the bordering slopes go upward. One example is Mexico’s high Central Plateau, at the south end of which is Mexico City, one of the world’s largest urban areas. This plateau is bordered on three sides by high mountain ranges. The high Plateau of Tibet is also bordered by rising slopes of the Himalayas and ther ranges. Mountains Mountains are the highest and usually the most rugged landform features. Some mountains stand as lone sentinels. In the United States, many such peaks are scattered about the Basin and Range physiographic region of the Southwest.

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