Human populations

The changed age structure (如何衔接)Given those changes to China population growth, birth rate, and fertility rate, age structure in China is also undergoing significant alterations. Age structure is usually divided into three categories: youth between 0 and14 years old, working age between 15 and 64 years old, and old populations who are 65 and above. The percentage of youth population was 37.19% in 1979, and declined to 28.84% 11 years after 1979. Years from 1992 to 2000 saw decline with relatively

Concept Paper Final Draft: “Demographic Winter and Its Effect on Society” For years, people have in mind that the world’s population has been increasing annually. While it is true that a daily increment of 215,060 and yearly growth of 1.10% is happening on our world population of 7,174,592,903 (United Nations, Department of Economic and Social Affairs Population Division, population Estimates, and Projections Sections), the demographic trend is actually changing in contrast to the beliefs of many. Historical

ver time, human development and distribution can be drastically changed and differed according to human and environmental factors. This has very much been the case in Brazil. Over the course of many years major cities like Sao Paulo and Rio de Janeiro have seen a significant increase in population density, but the creation of Brasilia and government funding of northern cities such as Manaus has also caused an evident shift in population distribution. This change has been created as a result of increase

to provide part of the solution to the challenge of an aging population, and to become a new driver for the economy in the long run. By the end of 2014, 212 million of China’s population were over 60 years of age, accounting for 15.5 percent of the total

political/classical economist born in the late 1760’s. He studied at several different schools in the areas of mathematics, literature, and arts. Malthus was married in the early 1800’s and had three children. Malthus is most famous for his theories on population growth and how he proposed we go about controlling it. He later died in the 1830’s at the age of 68. Childhood and Education Thomas Malthus, more commonly called Robert, was born near Guildford, Surrey, England. His parents, Daniel and Henrietta

would have thought that it was even more necessary to limit population than property...The neglect of this subject, which in existing states is so common, is a never-failing cause of poverty among the citizens; and poverty is the parent of both revolution and crime." This quote did not come from any professional doomsayer or modern writer, or even an ecologist or a historian. Aristotle said this, though he lived in a time where the population was four percent of what it is today. People have been worried

In the 1700, the Sea Otter population across the Pacific coast ranged from 150,000 to 300,000. This skyrocketing population was before the maritime fur trade that lasted till the 1900’s. By that time, there were less than 2000 Sea Otters. The Sea Otter is one of the smallest marine mammals in the world. Male Otters are approximately 150 cm long and weigh about 45 kilograms. They have a extremely small ears, black eyes, and long stiff whiskers. Their large teeth are used to crush hard materials

The one-child birth policy continues to be an issue of controversy that will continue to be debated by many. China has become the largest population in the world, which is why China's one-child policy was initiated in late 1979. (Xiao-Tian) This policy was made in order to set population control so that each couple can only have one child. This topic grabbed my attention immediately; I was doubtful and curious about what would happen if a Chinese woman would happen to conceive twins or more than

to understand why there are differences in the world’s population. Crude birth rate, crude death rate, natural increase rate, life expectancy and so on. Each of those are methods used by geographers to measure population. Geographers should not only look at those methods when trying to figure out the population differences. Some social factors like the economy, culture, lifestyle and the government contributes in the differences in population. Crude birth rate and life expectancy are the two most

There are many vulnerable populations within the United States. One of the many vulnerable populations are undocumented immigrants. Undocumented immigrants also known as illegal immigrants according to Wikipedia (2016) is defined as “the migration of people across national boarders in a way that violates the immigration laws of the destination country” (para 1). The United States of America has one of the largest population of immigrants. In this paper, I will be discussing the multiple stressors