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Ice Age Extinctions Of The Megafauna - 1,635 words
ICE AGE EXTINCTIONS OF THE MEGAFAUNA During the last Ice Age before humans arrived, the North American continent belonged to various forms of enormous, fantastic creatures. By the end of the Ice Age, most of these large animals had become extinct. Numerous attempts have been made to explain the disappearance of these animals, but there has yet to be a consensus. Among the theories that have been debated, two are predominant. They are the climatic change theory, and the overkill theory. The climatic change theory advocates the idea that the global warming, which brought about the end of the Ice Age, caused the animals to die off. The other is the overkill theory, which maintains that humans, ...
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Environmental Hazards - 1,241 words
... gy exists for point sources of pollution to be monitored and regulated, although political factors may complicate matters. Nonpoint sources-runoff water containing pesticides and fertilizers from acres of agricultural land, for example-are much more difficult to control. Pollution arising from nonpoint sources accounts for a majority of the contaminants in streams and lakes. With almost 80 percent of the planet covered by oceans, people have long acted as if those bodies of water could serve as a limitless dumping ground for wastes. Raw sewage, garbage, and oil spills have begun to overwhelm the diluting capabilities of the oceans, and most coastal waters are now polluted. The pollution ...
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Boobies Are Good - 1,102 words
Biodiversity is the measure of variety of the Earth's animal, plant and microbial species; of genetic differences within species and of the ecosystems that support those species. The term first came to public attention in 1992 at the Rio Earth Summit at which a convention for the preservation for the maintenance of biodiversity was signed by over 100 world leaders [excluding the USA as they feared it would undermine the patents and licences of US biotechnology companies] The maintenance of biodiversity is important for ecological stability and maintaining the gene pool, and as a resource for research into, for example, new drugs and crops What is causing a reduction in biodiversity in both t ...
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Auto - 417 words
Automobile Emissions, Individual Health and the Health Impacts Environmental Impacts Nitric Oxide (NO) is the nitrogen dioxide (NO2) water to form nitrate source of acid rain. odour increased sensitivity of asthmatics and those suffering from bronchitis NO2 is a lung irritant which can produce pulmonary edema at high concentrations increased susceptibility to respiratory infections in young children and the elderly NO2 reacts with water to form nitrate (NO3), a source of acid rain Acid rain accounts for an annual loss of $197 billion in commercial forest wood products and a further $1.3 billion due to recreation and wildlife habitat destruction NO2 contributes to the corrosion of metals and ...
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The Bald Eagle As An Endangered Species - 1,320 words
The bald eagle is the most well known endangered species because it is the nation's symbol. It is suppose to stand for freedom and the American way, but if we allow the bald eagle to become extinct how can we let something that doesn't exist anymore stand for freedom and the American way. Being the symbol of the nation, the bald eagle was put on the endangered species list faster than most species. When the bald eagle reached its low point in the 1960's (400 pairs), it was put on the endangered species list. The many federal acts or programs, the "Endangered Species Act" being the most effective, that were created for the bald eagle show how much the government cares about the symbol of our ...
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The Medicine Man - 534 words
The film Medicine Man gives a very clear indication of the consequences of habitat destruction. In the film, a professor and his research assistant sets out to find a plant that holds the cure of cancer, only to have it destroyed by land clearing in the Amazon Basin. The land clearing also severely disrupts the peaceful, sustainable lifestyle of a tribe of natives and a huge amount of flora and fauna. It shows us the damage we wrought with our deforestation on a slightly exaggerated, nut no less effective scale. The main idea of the film is to show habitat destruction and its impacts on the environment. It succeeds in showing the rapid rate at which logging and landclearing is taking place. ...
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Protection Of Endangered Species - 1,043 words
Out of all the species that have ever existed since the beginning of time, 98% of them are extinct (Facts). There are an estimated 5-10 million species that exist currently and only 1.5 million have been identified (Sherry, 2). Scientists classify species into six different groups: plants, animals, insects, algae, fungi, and microorganisms (Todays Situation). In the tropical rainforest alone, most species are disappearing at the rate of 1% a year (Sherry, 6). If the current trend continues, at least 50% of all currently existing species will be either extinct or endangered by the year 2050 (Todays Situation). For this reason endangered species deserve more protection than the current regulat ...
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Are The Threatened And Extinction Of Frogs An Indicator Of A Declining Planet? - 1,013 words
Outline I. Introduction Thesis Statement: Is the amphibian disappearances or deformities an early warning of serious environmental problems? II. Origins a. Early b. Evidence III. Habitat a. Ecosystem IV. Indicator a. Detection V. Disappearance a. Arizona VI. Why? a. Diseases b. Pollution VII. Frogs a. Endangered b. Threatened VIII. Conclusion Disappearance of Frogs Amphibian populations are declining or are disappearing around the world. Scientists are impetuously searching for clues as to why there is a decline in our frog species. In existence for over 350 million years, frogs have survived through the age of the dinosaurs and through the mass extinction of those dinosaurs. Why now, are th ...
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Regional Analysis Of The Arctic - 1,147 words
... Lamut, and Koryak of Siberia. The art and culture of these peoples is remarkable and is characterized by resourcefulness, adaptability, and innovation. The chief groups are now the Lapps of Europe; the Samoyedes (Nentsy) of W. Russia; the Yakuts, Tungus, Yukaghirs, and Chukchis of E. Russia; and the Eskimo of North America. There is a sizable Caucasian population in Siberia, and the people of Iceland are nearly all Caucasian. In Greenland, there is a mixture of Eskimos and northern Europeans, predominate. The indigenous peoples of the Arctic have their own distinctive cultures, economies and forms of social organizations, but they have a special relationship to the Arctic environment and ...
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