.... their society due to their type of land, climate and weather. "Among all the diverse natural environments of the earth, tropical rain forests are the most variegated in the sense that more diverse forms of life share this kind of habitat than occupy drier, cooler regions."(McNeill,16) Africa possesses the prefect breeding ground for many diseases. There were many diseases and viruses that have had an impact on Africa, however trypanosomiasis, malaria, yellow fever, AIDS, smallpox, onchocerciasis and yaws were the most destructive. African trypanosomiasis is a destructive disease that is often called "the sleeping sickness." It .....

.... six-pack rings, fishing lines, and net that humans discard into the ocean waters. Once entangled, they are unable to free themselves which can cause deep cuts, starvation, and drowning. Many ocean mammals have died as a result of ingesting these plastic items. In 1985, a sperm whale beached itself on a New Jersey shore; a mylar balloon was lodged in its stomach, and three feet of ribbon in its intestines. Most plastics take hundreds of years to break down. Many of the discarded items will sink to the ocean floor where they will combine with sediments, thus prolonging their duration in the sea. Other point sources of pollut .....

.... wrenching, screeching, scraping, tearing sounds of a vast machine breaking apart. L. Ray Silver, a leading author who covered the disaster at Chernobyl, said that within the core, steam reacts with zirconium to produce that first explosive in nature’s arsenal, hydrogen. Near-molten fuel fragments shatter nearly incandescent graphite, torching chunks of it, exploding the hydrogen. The explosion breaks every pipe in the building rocking it with such power that the building is split into sections (11-13). You look down at your body and notice that it feels hot and your hands look different. Unknown to you a tremendous am .....

.... It hit Alexandria in the autumn of that year, and by spring 1348, a thousand people a day were dying there. In Cairo, Egypt, the count was seven times that. The disease traveled by ship as readily as by land and it was no sooner in the eastern Mediterranean than it was in the western end as well. Already in 1347, the plague had hit Sicily. By winter the plague had reached mainland Italy. By January of 1348, the plague was in Marseilles, and it reached Paris in the spring of 1348. By September of 1348 the Bubonic Plague had worked its way into Bubonic plague was caused by the bacteria Yersinia Pestis. It is an or .....

.... their use. (16). Even so, pesticides have been used for centuries. In James Whorton’s book, Before Silent Spring, he describes agriculture before the Industrial Revolution. He writes that farmers in the 1800's used arsenic and sulphur to stop insects and molds from harming their crops. Even then it was known that arsenic caused skin lesions, nausea, vomiting, diarrhea, and swollen, painful hands and feet. In England in the late 1800's, arsenic was found in contaminated sulphuric acid, used then to make glucose for “cheap beer”. People in the poorest classes, who could only afford this “cheap beer”, were displa .....

.... lamps will heat every other section by 2.5 degrees. The unheated sections in between allow researchers to compare the efects of the lamps with the regular state of the meadow. One time a week, Harte will take gas samples from buckets turned upside down for ten minutes at a time on both the heated and unheated strips through fitted nipples at the bottoms of the buckets by syringes, then analyze them with a gas chromatograph. "We'll be able to plot any changes in the meadow very precisely," says Harte. Some of these changes could alter the very make-up of the seasons. With a 2.5 degree rise in temperature, snow at hi .....

.... combustion are minor contributors to this problem while chemicals such as chloroflourocarbons (CFCs), halons, carbon tetrachloride, methyl chloroform, methyl bromide and hydrochloroflourocarbons (HCFCs) are the major contributors to the deterioration of the ozone layer. These chemicals have industrial halocarbons that break up into chlorine and bromine in the upper stratosphere when they react with the sun's rays. Chlorine eats up the ozone layer while bromine acts as a catalyst and speeds up the process. Often found in Antarctica, there are frozen chemical clouds in the upper stratosphere called polar stratospheric clouds. .....

.... greenhouse gases increases. Since the beginning of the industrial revolution, great amounts of carbon dioxide have increased nearly 30%, methane concentrations have almost doubled, and nitrous oxide concentrations have risen about 15%. These increases have made the heat-trapping worse in the earth's atmosphere. Sulfate aerosols, a common air pollutant, cool the atmosphere by reflecting light back into space, but, sulfates do not live long in the atmosphere. Why are greenhouse gas concentrations increasing? Most scientists believe that the burning of fossil fuels and other human's doings is the main reason for t .....

.... The material was heated to soften it and then hand-formed into a solid, one piece ball.Gutta percha was black, so the early balls were painted white. Easier to make, less expensive, and more durable, the gutta revolutionized golf. When golfers discovered that balls and nicks flew longer and straighter then new ones, manufactures began to give them a textured, even pattern surface. The most popular early pattern was the bramble, which featured raised round bumps in concentric circles. the first wound rubber ball was introduced in 1898. the three-piece Haskell was the first ball to mix distance and control. Cleveland entrepren .....

.... and classifications of these disturbances, however, were confusing and controversial. Kraeplin set the basis for modern classification. He used the terms dementia, a belief that progressive deterioration occurred, and praecox, meaning the disorders began early. Later the term schizophrenia was applied by Bleuer. He argued that deterioration was not inevitable and that psychological factors played a role. As time went on many other different diagnostic terms were applied such as dementia infantilis, disintegrative psychoses, childhood schizophrenia, and childhood psychosis (Nelson, Israel, 1997). Schizophrenia became the .....