.... poisonous gases released from a car exhaust pipe. Carbon monoxide is a colorless and odorless, highly toxic gas that reduces the amount of oxygen that the blood can carry. Combined with the effects produced by the nicotine, it creates an imbalance in the demand for oxygen by the cells and the amount of oxygen the blood is able to supply. Tar is another chemical produced from cigarette smoke. Tar contains at least 30 cancer causing irritants. Tar is a mixture of several substances that condense into a sticky substance on the lung. Tobacco manufactures have produced a cigarette that is low tar and low nicotine to reduc .....

.... such substances as limestone or other known antacids can neutralize acids entering the body of water thereby protecting it. However, large areas of Ontario that are near the Pre-Cambrian Shield, with quartzite or granite based geology and little top soil, there is not enough buffering capacity to neutralize even small amounts of acid falling on the soil and the lakes. Therefore over time, the basic environment shifts from an alkaline to a acidic one. This is why many lakes in the Muskoka, Haliburton, Algonquin, Parry Sound and Manitoulin districts could lose their fisheries if sulphur emissions are not reduced substantially. .....

.... have many health problems associated with the disease. The most common way to get this disease is from one person to another. The other most common way is through unhealthy food and badly sanitized water. Not eating properly and excessive drinking will only worsen the disease. There are many ways that you can help prevent getting this disease. If you go to a foreign country, especially in the tropics, always drink purified water, always peel fruit and vegetables, and cook your food at any time possible. If you think that you may have amebic liver, you should get a liver scan and an ultrasound treatment. If y .....

.... of the chromosomes-hereditary regions where the DNA molecule may break or its portions may be rearranged into new combinations. Actually most of the times, the nucleus and the DNA are constantly exposed to substances that may alter the genes. But these alterations are almost always prepared by intricate mechanism with the function of preventing havoc in the cell. But if these changes persist in a given cell, that altered gene will breed true. Such damage to the chromosome may remove the oncogene from the influence of the genetic control mechanisms that normally govern its actions or an inactive oncogene may remove next to ano .....

.... have one X chromosome and one Y chromosome, but sometimes a variation will result in a male with an extra X. This is Klinefelter Syndrome and is often written as 47,XXY. There are other, less common variations such as 48,XXYY; 48,XXXY; 49,XXXXY; and XY/XXY mosaic. All of these are considered Klinefelter Syndrome variants. The major effect of the extra X chromosome in boys with Klinefelter Syndrome seems to be the function of the testes. The testes produce the major male sex hormone testosterone and the amount of this hormone may be decreased in boys with Klinefelter Syndrome. When these boys reach 10-12 years of age, it is helpf .....

.... Internet is a relatively new technology, television has been around for about fifty years. There are many problems with television though, mainly with the content of the shows. Many of the shows on television portray violence, drugs, sexual activity, and profanity. People who watch these shows see what the actors and actresses are doing and then feel it is all right for them to do the same things. If a kid is watching a show were one of the actors or actresses use profanity, they will feel it is all right for them to use the same language. When television first came on the market about fifty years ago, families had one tele .....

.... hole at which the escape velocity is just equal to the speed of light is called the event horizon. Anything, including light, that passes across the event horizon toward the black hole is forever trapped. Using a small black marble as an example to represent the size that the Earth would become if it collapsed and became a black hole, Todd R. Lauer, of the National Optical Astronomy Observatories said, " Black holes are very messy eaters. If you took that marble to an 'all-you-can-eat buffet' allowing it to consume all the matter around it, the feeding frenzy would produce as much radiation as the Sun." Research indicates that b .....

.... use of the use of the right hand rule. If the flux decreases, so the induced current produces an upward magnetic field that is "trying" to maintain the status quo. Let us consider what would happen if Lenz's law were just the reverse. The induced current would produce a flux in the same direction as the original change; this greater change in flux would produce an even larger current, followed by a still larger change in flux, and so on. The current would continue to grow indefinitely, producing power (=) even after the original stimulus ended. This would violate the conservation of energy. Such "perpetual - motion" devic .....

.... a mild to moderate case of the blues. They feel "down" for a while, but they are able to continue functioning and performing everyday tasks. Although these people may experience the chemical imbalance that is the hallmark of depression, the brain abnormality typically corrects itself within a few weeks. However, in some critical cases, the chemical alteration lasts for a much longer time, this is when mild to moderate depression turns into full blown clinical depression. The same chemical alteration that can result from first depressive episode, can also be the result of a naturally occurring biochemical disorder. It now appe .....

.... worry about feeding the hungry, you should study plant pathology or plant breeding. At some larger universities, you can even study specific types of , each with its own department. These departments include argonomy (field crops), microbiology (microbes like bacteria and fungi), horticulture (fruits, ornamentals, and veggies), and plant pathology (diseases pertaining to plants). If you are a people person, you might even be interested in teaching or providing public service. After hearing the endless list of career opportunities, you have probably found one that appeals to you. But how should you prepare for your new car .....