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Free research essays on topics related to: human population

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  • None Provided - 5,833 words
    ... s, we usually first remember by sight, then by sound, and last by the pronunciation of the word. There are many cell assembler in our body. Cell assemblers are basically many cells that are put together to preform a unified task, such as remembering. When cell assembly is developed, you can perceive an event, and you can also be able to perceive that really aren't there; such as when someone hallucinates something. When a child is growing up and maturing, the first three years or so are extremely important. The important thing to realize that speaking isn't the most important thing, the more important thing is to hear words that are spoken to you. Dr. Jean-Pierre Changeux participated in ...
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  • Crop Production - 879 words
    Beginning about 12,000 years ago, the human population began a trend that completely changed the way we, as a race, evolved. For the first time in history, humans pushed beyond the restraints of traditional hunting and gathering, into domestication and farming. It was a change that would not only take thousands of years to prove worthy, but also may have set us back on the evolutionary path at the time. Along the path to this point, we have been constantly changing and finding new ways to produce and maximize the yield of the crops we sow. Have these changes been successful or detrimental to us? The following will search into answering this question. Since the beginning, increased crop produ ...
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  • Caries - 2,372 words
    ... d warming of climate where there is an increase in the growth of plant material and plant foods. This change would have promoted a growth in subsistence farming, at the very least. This would have increased the amount of plant carbohydrates and thus there was an increase in the occurrence in evidence of caries. Again in the Mesolithic there is further warming in the surrounding climate to the point where an even greater amount of plant food harvest is attainable for human consumption. Frayer found that for the Mesolithic, there was a negative correlation between rates of caries and latitude. This was the case where skeletal assemblages from northern sites continually show a decrease in c ...
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  • The Social Brain - 1,422 words
    ... tus were also unique, as he realized the environment could be controlled for personal improvement (Gazzaniga, 149). This was evident in the new nomadic behavior of hunters and gathers as populations behavior become more nomadic As a hominid continued to evolve the Neanderthal played an important role in the changes of brain activity and behavior. The Neanderthals dominant influence of the Wenickes and Broca areas of the brain allowed for the specialization of skill in tool making, shelter, and hunting ability. Neanderthals lived in larger groups thrived off competition and social relations evident in their self adornment with clothing and tools. Neanderthals lived in caves and buried the ...
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  • Reasons To Kill Animals - 828 words
    As a woman and animal lover, I could understand Joy William's feelings and motives in The Killing Game. Ms. William's believe that hunting or killing of animals is "murder, murder, murder". In this essay she states point blank that she is completely against hunting of any kind and for any reason. I can sympathize with her love and appreciation of animals, as I am a true animal lover and enthusiast. I am also, however, a rancher who Ms. William's ridiculed in her essay. I firmly believe in hunting over-populated game and predators of our livestock. I feel that hunting is a necessary act to keep a balance in our ecosystem between the people and animals of our world. Ms. Williams makes many tru ...
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  • Water - 1,126 words
    1. Introduction to open water waste disposal. 2. Introduction of oil into marine environments. 3. Introduction of plastics/pollutants into marine environments. 4. Possible solutions to waste disposal into our water systems. The oceans and the life they sustain have had enough. They can no longer endure the unwanted pollution of careless, inconsiderate people worldwide. The societies of this world need to wake up, and not only listen to, but understand that it is time to find better ways of dealing with wastes, rather than nonchalantly dumping it into our oceans. For decades people in societies worldwide have taken advantage of the Earth=s waters simply by dumping whatever they do not want in ...
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  • The Concept Of The Natural Step - 1,371 words
    Can Natural Step promote sustainability in Organisations? There are three examples where companies have used The Natural Step and the outcomes prove whether it promotes sustainability. The examples shown are Stena Metall AB, an industrial recycling, trading and shipping company. The second example is Scandic Hotels and example three is Interface, a manufacturer of commercial floor covering. The Natural Step is a non- profit environmental education organisation with sight of the socially and ecologically sustainable society. Karl Henrik Robert, a cancer doctor in Sweden, discovered Natural Step in 1989. He noticed an increase in childhood leukaemia cases and seen and understood an association ...
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  • Environmental Activism - 1,365 words
    ... ship as that implies dominance. Instead we believe, as did Aldo Leopold, that we should be plain citizens of the land community". This meant no permanent human habitation (with minor exceptions); no use of mechanized equipment or vehicles; no roads; no logging, mining, water diversion, industrial activity, agriculture, or grazing; no use of artificial chemical substances; no suppression of wildfires; no overflights by aircraft; no priority given to the safety and convenience of human visitors over the functioning of the ecosystem. Even more visionary than these land community guidelines was the demand for the restoration of dams, roads, power lines, and the other intrusions of industrial ...
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  • The Environment - 384 words
    Our environment is a topic that receives a great deal of attention. The environment has been the basis of numerous television and radio commentaries as well as a multitude of newspaper and magazine articles. The environment is even the foundation for many political debates addressing issues and the concerns about what is happening and what will happen to the environment over the next several years. A look at the past I s helpful in understanding the present concern. Comparatively speaking, little emphasis was placed on ecology (the study of the relationship of plants and animals to their environment) prior to 1955 Air pollution, toxic waste, marine pollution, pesticides, oil spills, acid rai ...
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  • Environmental Hazards - 1,289 words
    Every thing present in this universe is a part of environment including ourselves. Whether they are animals , living thing, or nonliving things. All of the external factors affecting an organism. These factors may be other living organisms (biotic factors) or nonliving variables (abiotic factors), such as water, soil, climate, light, and oxygen. All interacting biotic and abiotic factors together make up an ecosystem. Organisms and their environment constantly interact, and both are changed by this interaction. Additionally, environmental factors, singly or in combination, ultimately limit the size that any population may attain. This limit, a population's carrying capacity, is usually reach ...
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  • Aldo Leopold Ecocentrism - 791 words
    Ecocentrism: The Land Ethic By: Aldo Leopold This is a summary of Leopold's ideas and my views on them. 1) Leopold strongly suggests the need for land ethic because he sees a great lack for it. Humans see land as an economical resource. Land is used for our needs and enjoyment with the belief that we are the ruler and conqueror of the land. Humans feel superior to the land and all that live on it and therefore lack the sense of being a part of land. To have land ethic is to become a part of the land not a disconnected from it. When we separate ourselves from the land, we forget our obligation to take care of it. We use, abuse, and take land for granted. We are the ultimate consumers of land. ...
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  • Evolution A Theory - 1,144 words
    ... p after all the animals, the work load was considerably reduced by the fact that the animals were kept in the dark and therefore entered into a state of hibernation. The earth's human population and all present-day species of birds and land animals are all descendants of the Noah's ark survivors. There have been numerous aerial sightings and eyewitness accounts of persons who have actually seen the ark close up on the slopes Mount Ararat in eastern Turkey. Constructing a wooden ship the size of the ark in times of antiquity would require an enormous expenditure of labor and materials. Where did Noah, by all accounts an ordinary man, obtain the Wooden ships do not withstand violent wind a ...
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  • Climatic Change - 4,160 words
    This paper looks at the controversial issue of climatic change. In particular, it develops the question of if and why earths climate is changing? The roles of man, naturally occurring trends, and earths cycles are considered, and an outlook for what can be expected in the near and distant future is given. The uneasiness of modern man arises from a rupture between himself and nature that leaves him homeless within the universe... Over the past years most individuals have become acutely aware that the intensity of human and economic development enjoyed over the 20th century cannot be sustained. Material consumption and ever increasing populations are already stressing the earths ecosystems. Ho ...
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  • Population - 1,508 words
    A population according to the funk and Wangnall Dictionary is a grouping of individuals subject to the processes of birth, death, and migration.. During the first 2 million years of our history the human population had very little effect upon the overall world ecosystem, with no more than 10 million members. In the New Stone Age, less than 10,000 years ago, the number of humans began to increase more rapidly. By the beginning of the Christian era it had reached 250 million, and by the year 1650 CE up to half a billion(Internet Source)Reproduction resulted un having children which were perfect for doing farmwork, collecting dowry and starting family. By 2030,the population is projected to hit ...
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  • History Of Aids - 1,418 words
    Debate around the origin of AIDS has sparked considerable interest and controversy since the beginning of the epidemic. However, in trying to identify where AIDS originated, there is a danger that people may try and use the debate to attribute blame for the disease to particular groups of individuals or certain lifestyles. The first cases of AIDS occurred in the USA in 1981, but they provide little information about the source of the disease. There is now clear evidence that the disease AIDS is caused by the virus HIV. So to find the source of AIDS we need to look for the origin of HIV. The issue of the origin of HIV could go beyond one of purely academic interest, as an understanding of whe ...
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  • Vegetarianism - 1,176 words
    Vegetarianism is the limitation of ones diet to only plants, vegetables, grains, and fruits, without eating any food derived from an animal. There are different extremes of vegetarianism, where you can eat dairy, but not eggs, only milk, etc And the reasons why people convert to this diet differ. Health, religion, compassion for the animals, it usually varies. Vegetarianism has been around for centuries, beginning with the peaceful Hindu and Buddhist religions, but recently we have seen the eruption of a more militant vegetarianism that is inspired by the animal rights movement. Today, vegetarian activists are throwing pies at Ronald McDonald and the Pork Queen, scrawling, "meat is murder" i ...
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  • Meteor Impacts - 579 words
    Meteors are very common throughout outer space. They are being whipped around our solar system in every orbit possible. Normally they are peacefully and serenely floating through space, but one just has to look at the cratered face of our moon or Jupiters moon Callisto to see that more than a few meteors journeys through space have been interrupted. The earth has been hit before and will be hit in the future, statistics show this. We must detect the meteors a long time before they cross paths with Earth to prevent an impact. The likelihood of a significant meteor impact in the near future is extremely small, but it is still a possibility. The earth is just like every other planetary body in ...
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  • Desert Tortoises - 1,127 words
    Vulnerable to the harsh desert conditions, the desert tortoise spends almost all of its time waiting out extreme temperatures in its underground burrow. There, this armored, terrestrial turtle conserves its energy and stays relatively cool during summer months, and relatively warm during winter months. This turtle, Californias official state reptile, carries a high-domed tan to dark brown carapace (shell), which protects them from most predators. Yet even those shells are unable to shield the desert tortoise from such threats as the golden eagle and the automobile. Desert tortoises commonly dig their burrows in dry, gravelly soil beneath creosote bushes, large shrubs, or beside washes in the ...
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  • The Impact Of A Car - 1,192 words
    ... ectric car came out a couple of years ago, which people thought would be a great idea. Electric pumps at every gas station, a charger at your house, good idea, right? No, wrong. Two main sources of pollution during the ownership of the electric car (not including its manufacture) are the source of electricity itself, and the production and disposal of the lead and sulphuric acid of the batteries. Two other bad points about the electric vehicle include the fact of how unattractive they are and how hard it is to change them up all the time, and the power doesnt last very long. In my opinion, the best alternative is the Nissan Sentra Clean-Air Model which is compared to the Sentra GXE. The ...
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  • Rain Forest - 722 words
    Global Warming is sometimes referred to as the greenhouse effect. The greenhouse effect is the absorption of energy radiated from the Earth's surface by carbon dioxide and other gases in the atmosphere, causing the atmosphere to become warmer. The greenhouse effect is what is causing the temperature on the Earth to rise, and creating many problems that have started and will continue to occur in the coming decades. Life could not exist if there was no natural greenhouse effect. The reason for the natural greenhouse effect is so that all the creatures living on Earth can live and breathe. We as inhabitants of this Earth must do our part in preserving it, or there won't be much left for our chi ...
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