What part of American history makes it difficult for us to suggest halting deforestation in the tropical rainforest? How did deforestation proceed in the United States? Why is deforestation there different than it was here?
What will be an ideal response?
Timber harvesting propelled the growth of the United States throughout its phenomenal expansion across the continent in the 19th century and into the 20th. Chicago was built with timber felled in the vast pine and hardwood forests of Wisconsin and Michigan. Those forests were virtually stripped of their trees in the 19th century. This followed the clear-cutting of the forests further east, which had been largely replaced by small farms. Logging operations then moved south to the Ozarks of Missouri and Arkansas to harvest more wood for the growing nation. The pine woodlands of the South were logged and many of them converted to pine plantations. When the largest, most valuable trees had been removed from these areas, timber companies moved west, cutting the continent's biggest trees in the Rockies, the Sierras, the Cascades, and the coast ranges. By the mid-20th century almost no virgin timber was left in the lower 48 states. Many U.S. trends are being paralleled internationally, but some developing nations, such as Brazil, are in the position the United States faced a century or two ago, having a vast frontier to conquer. However, in these countries, deforestation can proceed more quickly because of newer technology. Furthermore, much of the cutting is being done not by the people of those countries but by multinational corporations that export the products elsewhere.
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A primary factor causing monsoon circulations is:
A) Coriolis effect. B) ocean currents. C) greater temperature changes over continents compared to oceans. D) mountain ranges. E) waves in the westerlies.
Freezing nuclei are a part of the _______________ process of forming precipitation
Fill in the blank(s) with correct word
How can hydrogen gas be produced via the use of solar energy? How might hydrogen be collected and stored to meet the need for fuel for transportation in the future?
What will be an ideal response?
If a small amount of water is aspirated into the trachea during a submersion event:
A) the victim asphyxiates, becomes profoundly acidotic, and dies. B) laryngospasm occurs and temporarily protects the lower airway. C) permanent laryngeal spasm occurs and requires cricothyrotomy. D) resulting hypoxemia causes the body to shift to aerobic metabolism.