How It Came To Be Mongolia

In 1206 A.D., a single Mongolian state was formed based on the nomadic tribes under the leadership of Genghis Khan the ultimate conqueror who was able to possessed nearly all of Asia and European Russia and sent his troops to as far as the center of Europe and Southeast Asia.Although Mongol's alliances operated their political power over the conquered territories, their authority deteriorated suddenly after the Mongol was overthrown by China in 1368 A.D. Later in 1691 A.D., Mongolia was under controlled by the Manchus (a tribal group who conquered China in 1644 A.D.), they were given trust and swore the word of allegiance to the Manchu emperor. As Manchu's authority in China waned, and as Russia and japan confronted each other during the WWI, Russia gave arms and diplomatic support to nationalists among the Mongol religious leaders and nobles. The Mongols accepted Russian aid and proclaimed their independence of Chinese rule in 1911, shortly after a successful Chinese revolt against the Manchus. In the early 1960s, Mongolia attempted to maintain a neutral position a midst increasingly contentious Sino-Soviet polemics; this orientation changed in the middle of the decade.

Nowadays's nomadic mongol is still moving after

http://www.welcome2mongolia.com/archives/ancient-nomadic-tribes/

http://countrystudies.us/mongolia/26.htm

http://en.wikipedia.org/wiki/History_of_Mongolia

Human and Environmental Impact on Thailand Flood (2011)

In Thailand, flood is the number-one natural disaster in terms of the number of lives lost and property damage. 2011 Thailand Flood  is the result of a multitude of naturally occurring and human-induced factors, but it can be defined as the accumulation of too much water in too little time in a specific area. It can occur at any time of the year, in any part of the country, and at any time of the day or night. Most lives are lost when people are swept away by flood currents, whereas most property damage results from sediment in the water. Flood currents also possess tremendous destructive power that can demolish buildings and erosion can wreck bridge foundations and footings leading to the collapse of structures. Seven major industrial estates have been inundated by as much as 3 meters for at least a month now. Although several factories having been building up to 6 meter blockage, the stronger currents are always interfering the reconstruction resulted the entire area to be non-operational. Not only the moving water that causes huge damage, but also the resting water that produce toxic gases and create hindrance to the transporting people. Human impact is one of the influences the lead to flood. Long time ago when the lands were mostly agricultural field, the naturally occurred waterways were a balance of nature (transferring water in and out). Since the development of city, those rice fields were adjusted to fit the modern lifestyle; in turn, that change led to the disappearances of many native waterways. After native waterways were gone, excessive water can no more sluice naturally (e.g. wharf creates bottleneck in river path). The current tap water comes from drawn underground water which alternately leads to the unbalanced pressure of sand, clay, and stone above the water source. After the ground is subsided, the whole area will change into basin inducing the body of water around it to gather and, then, confined until it is drained away. One notable error in communications between Thai medias and foreign companies was the lack of information in English (there is but it is not very accurate). It is important for the government to provide accurate information and execute long-term prevention standard. However, many international internet sites has provided free access to near-real-time flood information. There is still a lack in receiving enough and accurate information and some community cannot  emigrate and move critical equipment in time. I hope that the flood situation in Thailand will be relieved soon, thanks to the spirits of every Thai citizen. (Y)







http://en.wikipedia.org/wiki/2011_Thailand_floods
http://hilight.kapook.com/view/52961
http://ks.water.usgs.gov/pubs/fact-sheets/fs.024-00.html

Population changes and economic development in Zimbabwe

It is a commonly held theory that the population is related to levels of social and economic development. The annual work of www.census.gov gives much drive to study the relationship among birth and death, fertility, mortality, migration, and urbanization rates. The determinants of demographic transitions within the country setting are seen as economic, social, and mortality factors. Census data, on Zimbabwe, shows stability of population through a decline in the birth rate. In most rural areas the continuity decline in childhood death means that at some point parents realize they do not need so many children to be born to ensure a comfortable old age. As childhood death continues to fall and incomes increase, parents can become increasingly confident that fewer children will suffice to help in family business and care for them in old age. Increasing urbanization changes the traditional values placed upon fertility and the value of children in rural society. Urban living also raises the cost of dependent children to a family. A recent theory suggests that urbanization also contributes to reducing the birth rate because it disrupts normal mating ages. The cost of children to parents is worsen by the introduction of compulsory education acts and the increased need to educate children so they can take up a respected position in society. In some of the most undeveloped countries, children now need to be clothed and parents begin to consider buying their children toys and books. Wholly due to obligatory education and better quality of life, people begin to reassess their need for abundant children and the ability to raise them. As the world develop, woman right to work leads to the decline in birth rate since the mother need to work lesser children can help by relieving their duty. The resulting changes in the age structure of the population include a reduction in the youth dependency ratio. The population structure becomes less triangular and more like a prolonged balloon. During the period between the decline in youth dependency and rise in old age dependency there is an increasing opportunity that can potentially produce economic growth through an increase in the ratio of working age to dependent population. 

http://www.d-transition.info/countries-glance-3/zimbabwe-95/

Resources:
http://en.wikipedia.org/wiki/Demographic_transition
http://geographyfieldwork.com/DemographicTransition.htm
http://www.globalchange.umich.edu/globalchange2/current/lectures/pop_socio/pop_socio.html