.... harmless. WHO ARE AT RISK OF GETTING AIDS? Over 500 Singaporeans have been tested positive for HIV (up to late- 1996), however, this is probably only the tip of the iceberg as there are many others who are infected but do not know that they are. In the 1980s, the majority of infections in Singapore were homosexual or bisexual men; but now there are many infections seen among heterosexual men and women. Heterosexual sex is now the main method of transmission in Singapore and over 75% of infections throughout the world are acquired through heterosexual intercourse. Not everybody who has sex with an infected person will get infected. However, the risks increase sharply ....

.... the most dangerous ingredients in cigarette tobacco. Cigarette smokers are addicted to the nicotine in cigarettes just like a junkie is addicted to heroin or cocaine. When a person smokes a cigarette the body reacts immediately to the chemical nicotine. Nicotine begins to effect a smoker’s blood pressure, the flow of blood from their heart, the heart beat and breathing rate. Cigarette smoke also contains carbon monoxide, the same 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 ....

.... the burning that is required to turn the turbines releases much sulfur, nitrogen gases, and other pollutants into the atmosphere. The cleanest, cheapest, and least polluting power plant of the two types is the hydroelectric power plant. The main reason most countries use thermal versus the hydroelectric is because their countries don't have enough concentrated water to create enough energy to generate electricity. (World Book vol. 14, 586) plants generate only about eleven percent of the world's electricity. There are around 316 plants in the world that create 213,000 megawatts of electricity. (INFOPEDIA) Radioactive, or nuclear, waste is the by-product of nuclear fi ....

.... and manipulated with computers. Viewers are witnessing the results of all this in the form of stories and experiences that they never dreamed of before. Perhaps the most surprising aspect of all this, however, is that the entire digital effects and animation industry is still in its infancy. The future looks bright. How It Was In the beginning, computer graphics were as cumbersome and as hard to control as dinosaurs must have been in their own time. Like dinosaurs, the hardware systems, or muscles, of early computer graphics were huge and ungainly. The machines often filled entire buildings. Also like dinosaurs, the software programs or brains of computer gr ....

.... Although recycling of wastes material solves the problem of garbage disposal at landfills, and saves resources, it does nevertheless entail large hidden costs in collecting, sorting and manufacturing; therefore, it is necessary for the government to overcome such problems of recycling to be worth while and for manufacturers and consumers to consume less. Recycling has proven its efficiency in solving the problem of garbage disposal at landfills1. By the accumulation of garbage throughout the years, space available for garbage has largely diminished. In the states for example almost 67% of their waste stream ends up in landfills.(Scott 25). This has in fact increased the pr ....

.... some important evidence connected with them. On July 2, 1947, during a severe thunderstorm, a saucer flew near to the ground at a great velocity. It exploded. Its pieces scattered over an area near Corona, New Mexico. The next day William "Mac" Brazel, foreman of the Foster Ranch, and his seven-year-old neighbor, Dee, found the remains of the wrecked UFO scattered over a large area. When Brazel drove Dee back home, he showed some of the material to her parents. They all agreed the material was unlike anything they had ever seen. On July 6 Brazel drove into town with a few pieces of the wreck. He showed the material to the Chaves County Sheriff George Wilcox. The sheriff c ....

.... been stable. Solidified magma containing magnetic imprints reveal periods of time when the Earth’s magnetic fields have actually been reversed. Convection is caused by non-uniform temperature in a fluid and density differences. This continuous convection is the cause of plate movement. Each complete cycle, called a convection cell, drives the plate in the direction of the cell. How does a ‘solid’ mantle move? The mantle may be solid but, as with most solids, it will deform if long-term stress is applied. Presently, there are more than fourteen plates in the Earth’s crust. Upwelling hot magma flows out from mid-ocean ridges and then cools down when exposed to the coo ....

.... much smoke that rapid, substantial temperature and rainfall decreases would occur over wide areas of the middle Northern Hemisphere. Smaller temperature decreases might occur in low latitudes but more importantly in these regions rainfall would probably decreases because monsoons could not develop. Like in On The Beach, all the radiation move towards Australia and everyone innocent people died. A large-scale nuclear war would lessen food production over large expanses in the Northern Hemisphere, this could occur through acute climatic conditions which chilling or freezing temperatures occurring for brief periods during the growing season which could destroy crops or l ....