... they would reach 35-50 feet high over most of the Earth's surface. What would happen if the rotation rate of the Earth were halved, or doubled? If it were halved, the seasons would be doubled in their length, which would cause such harsh heat and cold over much of the Earth that it would be difficult, if not impossible, to grow ... enough food to feed the Earth's population. If the rotation rate were doubled, the length of each season would be halved, and it would be difficult or impossible to ... grow enough food to feed the Earth's population. The Earth is tilted on its axis at exact...

• Word Count: 2632
• Approx Pages: 11
• Grade Level: High School

... with deforestation. Again, forests are quite often cleared in an especially destructive manner, rendering them lifeless. This eventually leaves the land barren. Agricultural pressures are the other prime population-enduced source of 5 desertification. Increasing populations in developing countries drive people into drier and drier regions to farm. Attempting to farm in areas that are already poor or unsuitable ... seafood harvest of twenty two million tons in 1950 increased to one hundred million tons in 1989(see Figure 3)(Brown, 1994, p. 82). For the average person, seafood consumption...

• Word Count: 3065
• Approx Pages: 12
• Has Bibliography
• Grade Level: High School

... . In addition, the clearing and burning of forests causes the pool of carbon which has been tied up in trees to be released. Deforestation is in part the result of population expansion in the tropics and the use of land for agriculture and wood for energy. Satellite photos show smoke from the smoldering fires that are rising into the air over ... natural variation of mean global temperature over periods of 200 to 200 years has been at most 0.5 to 1 C. This is smaller than the expected rise in mean global temperature for doubled CO2 by at least a factor of 4. The warming would be two or t...

• Word Count: 2775
• Approx Pages: 11
• Grade Level: Undergraduate