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Air Pollution

... trap pollutants that have accumulated in the lower layer of air. In the 1940s, the air in Los Angeles became noticeably polluted, interfering with visibility and causing human discomfort. Attempts to control pollution, initiated during the 1950s, resulted in the successful elimination of such sources of pollution as industrial effluents and the outdoor burning of trash and debris. Nevertheless, pollution continued to increase as a result of the increased number of motor vehicles. Exhaust fumes from the engines of automobiles contain a ...

Number of words: 475 | Number of pages: 2

The Problem Of Global Warming

... major influence to the increase in global temperature as well. The destruction of the rainforests and all forests and trees in general, is another. Every car produces enough gases from its exhaust into the atmosphere that takes a mature tree to clean in about five years. Trees keep the air clean for the environment by taking the gases in and produces oxygen out of it. By cutting down the trees we are allowing for more of the carbon to be exposed into the atmosphere. Another factor that most people would not consider in the raising of gl ...

Number of words: 457 | Number of pages: 2

Internet

... application that connects tens of thousands of interconnected computer networks that include 1.7 million host computers around the world. The basis of connecting all these computers together is by the use of ordinary telephone wires. Users are then directly joined to other computer users at there own will for a small connection fee per month. The connection conveniently includes unlimited access to over a million web sites twenty-four hours a day, seven days a week. Since the can be accessed by millions of people all time, it would be a ...

Number of words: 1053 | Number of pages: 4

Attention Deficit Disorder ( Add)

... other community resources speed up the course of the disorder. The disorder is defined as a person having inappropriate degrees of inattention, impulsiveness and hyperactivity. The symptoms that have been displays with in the degree of inattention are: „h The difficulty of paying attention in tasks or a certain amount of time. „h Trouble with following instructions. „h Often losing things for needed tasks. Impulsiveness of the disorder may include the following: „h Acting before thinking - this may lead to failing academically or ...

Number of words: 1447 | Number of pages: 6

Natural Resources And Management

... mining town an irrigation canal a dam All of these can be cultural resources. Cultural resources are the physical remains of a people's way of life that archaeologists and historians study to try to interpret how people lived. Cultural resources are important because they help us to learn about our past. These tangible remains help us understand other cultures, appreciate architecture and engineering, and learn about past accomplishments. Furthermore, they offer educational and recreational opportunities and provide links to our past. P ...

Number of words: 532 | Number of pages: 2

Geoloy Of Mars

... to understand due to the effect of blurring that is caused by the two atmospheres of Mars. Scientists do know, however, that Mars is relatively small and that changes take place in the surface features when the seasons change. It is also known that dust storms are prevalent and leaves the surface of Mars covered by a red haze. Mars has a very thin atmosphere which is composed of carbon dioxide, nitrogen, argon, water vapor and oxygen. Mars also has no magnetic field. " Because the atmosphere of mars is so thin, wind velocities up to severa ...

Number of words: 335 | Number of pages: 2

Is Medical Testing On Animals Ethical

... has been cured through vivisection in this century. The overall cancer rate has risen in the past forty years, and a fatal heart attack strikes a person every forty-five seconds. The Centers for Disease Control (CDC) estimate that seventy to eighty percent of the common diseases killing Americans can be prevented by a responsible lifestyle and diet. Drug testing on animals is not accurate and has no advantage to animals or people. Animals including dogs, cats, mice, pigs, monkeys, horses, deer, and cattle are commonly used for these sens ...

Number of words: 439 | Number of pages: 2

Concept Of Species

... are reproductively isolated from other such groups” However, this is a definition on what happens in nature. Mayr later amended this definition to include an ecological component; “..a reproductive community of populations (reproductively isolated from others) that occupies a specific niche in nature The BSC is greatly accepted amongst vertebrate zoologists & entomologists. Two reasons account for this .Firstly these are the groups that the authors of the BSC worked with. (Mayr is an ornithologist & Dobzhansky has worked ...

Number of words: 1248 | Number of pages: 5

Fishes

... and the sharks have highly adept senses for vision, olfaction, and hearing. They even posses a system of microscopic organs which can detect changes in water pressure around the shall. Sharks do not possess gills flaps like a fish so a shark must continuously move in order to obtain enough oxygen to survey. The large teeth of a shark are evolutionarily derived from jagged skin scales. Which are apparent on shark’s ancestor’s Placodermi class. The digestion system of a shark contains a “spiral valve” intesti ...

Number of words: 503 | Number of pages: 2

The Dog

... & HABITAT Little is known about wild dogs of the past but that they are carnivores: hunters and scavengers. This means that they are secondary consumers in web chains. Eventhough they are carnivores they sometimes accept eating green plants. The ecology of dogs right know is that it helps the human in many fields of life. Since the cave dweller times, dogs have been domesticated by humans and it has helped him to hunt, in herding, protection, etc. It has been very important as a work animal and as a psychological support for humans. The h ...

Number of words: 3730 | Number of pages: 14

Bipolar Disorder

... debilitating symptoms, it is imperative that we remain vigilant in the quest for explanations of its causes and treatment. Affective disorders are characterized by a smorgasbord of symptoms that can be broken into manic and depressive episodes. The depressive episodes are characterized by intense feelings of sadness and despair that can become feelings of hopelessness and helplessness. Some of the symptoms of a depressive episode include anhedonia, disturbances in sleep and appetite, psycomoter retardation, loss of energy, feelings o ...

Number of words: 427 | Number of pages: 2

Acid Rain: Scourge From The Skies

... that is appealing to today’s society, as well as informative especially for today’s constantly changing world. Firstly, the developmental devices used in the essay are vital to it’s effectiveness. Without them, the author would not have been able to supply sufficient proof to his findings and convince the reader of the true severity of acid rain. Collins used noteworthy facts throughout the essay to prove is point about how severe acid rain truly is. The facts that he used added substance to the essay by validating his point of v ...

Number of words: 995 | Number of pages: 4

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