.... the naturally occurring greenhouse gases are Methane and carbon dioxide. This is the way the Earth keeps itself warm enough for humans to live on it. The only problem with this is that humans enhance the process even more. Over the past 200 years the emissions of greenhouse gases have been increasing due to the increase in technology that humans have developed (example, factories). These human-induced gases include carbon dioxide, methane, nitrous oxide, and ozone depleting substances such as CFCs, also known as Chlorofluorocarbons, hydrofluorocarbons, and perfluorocarbons. These gases are generated a number of human activities such as fossil fuel com .....

.... in 1981. The American Heart Dissociation, the American Medical Association also joined the low-salt appeal. They believe that sodium salt is connected with heart disease, circulator disorder, stroke and even early death. By many doctors and researchers are now beginning to feel that salt has gone too far. At the University of Alabama, a short-term research has been done on 150 people on the effect of the intake of salt related to high blood pressure. Result shows that those with normal blood pressure experience no change at all when placed in a extremely low salt diet, or later when salt was introduced, Of the hypertensive subjects, half of those o .....

.... learned to cut specific genes from DNA and to build customized DNA using these genes. They also learned about vectors, strands of DNA like viruses, which can infect a cell and insert themselves into its DNA. With this knowledge, scientists started to build vectors which incorporated genes of their choosing and used the new vectors to insert these genes into the DNA of living organisms. Genetic engineers believe they can improve the foods we eat by doing this. For example, tomatoes are sensitive to frost. This shortens their growing season. Fish, on the other hand, survive in very cold water. Scientists identified a particular gene which enables a flounder to r .....

.... four hundred megabytes of information. That is about half of what an average hard drive holds up to today. A hard drive is what all the information you install in to your computer goes. Inside a hard drive it looks like large CD:ROM , but this one is magnetic. If you open one up it will look like egular record player. The needle is what writes the information onto the hard drive. The needle writes by the magnetic force that pushes it down on to the disk. Once it is on the hard drive , whenever you turn on your computer the information is always there for you when you need it. A CD:ROM looks like a music compact disk , but they are not that much alike. Firs .....

.... consumption and ever increasing populations are already stressing the earth’s ecosystems. How much more the earth can take remains a very heated issue. Here a look at the facts sheds some very dark light. In 1950, there were 2.5 billion people, while today there are 5.8 billion. There may well be 10 billion people on earth before the middle of the next century. Even more significant, on an ecological level, is the rise in per capita energy and material consumption which, in the last 40 years, has soared faster than the human population. “An irresistible economy seems to be on a collision course with an immovable ecosphere.” Based on these facts alone, the .....

.... of mankind rather than blindly accepting faith-filled beliefs we may received from our parents as children. Perhaps it is because we live in a nation filled with many peoples of different beliefs whose Gods are all so varied and different that it is difficult to fathom that they are all the same divine being. It is also plausible that we just have a desire to quench the thirst for knowledge that lies deep within ourselves. As for myself, I cannot believe in a being which created a universe and a multitude of worlds in a rather short period of time then deigns to lower itself into becoming a puppet-master and "pulling the strings" of the Earth and all .....

.... common in smokers because it develops in the bronchi and spreads by invading local tissues, than to the lymph nodes and into the blood. Large - cell carcinoma is a tumor that is fairly larger than other types. They don’t form keratin but they are common in smokers. They develop in the central or peripheral part of the lungs and the lymph glands. Small cell carcinoma tumors are small and fragile. They are divided into groups by their shapes. The term “oat cell carcinoma” is used to develop in smokers and usually in the central part of the lung. They spread by the lymph glands and into the blood stream early. This type of tumors can onl .....

.... problem is to determine the effects of air pressure at different temperatures. Since we cannot see air, we will attempt to determine if air exerts a force? HYPOTHESIS: My hypothesis for: 1) the experiment with the pop can is that the can will crush because of a drastic change in temperature. 2) the experiment with the milk jug and the hot water is that the milk jug will remain the same. 3) the experiment with the egg and the bottle is that the egg will not be sucked in the bottle. PROCEDURE: For the first experiment the procedure is: 1) Heat an ordinary pop can on a hot plate. 2) After about fifteen minutes take the can off the hot plate a .....