.... but coal is the main source, making up 39%. However, fossil fuels such as coal, require greater quantities to produce the equivalent amount of electricity produced from Uranium. The use of nuclear power opposed to burning fossil fuels has reduced carbon dioxide emissions by 2 billion tonnes per year, minimising the global warming effect on the atmosphere. Carbon dioxide is responsible for half of man made gases contributing to the Greenhouse Effect, and has sparked action from the UN Intergovernment Panel on Climate Change. Their consensus is a concern for the environment in the next century if fossil fuels continue to be used, even at present globa .....

.... acid/base extraction is to separate a mixture of equal parts of benzoic acid(strong acid) and 2-naphthanol(weak base) and 1,4- dimethoxybenzene(neutral) by extracting from tert-butylmethyl ether(very volatile).The goal of this experiment was to identify the three components in the mixture and to determine the percent recovery of each from the mixture. 4) Separation of a Neutral and Basic Substance A mixture of equal parts of a neutral substance containing either naphthalene or benzoin and a basic substance containing either 4-chloroaniline or ethyl 4-aminobenzoate were to be separated by extraction from an ether solution. Once the separation took place, a .....

.... 5 billion light-years away. The most interesting supernova of recent times was detected in the relatively nearby Large MAGELLANIC CLOUD, on Feb. 23, 1987, by an astronomer at Chile's Las Campanas Observatory. It quickly became an object of intense study by all the means available to modern astronomy. A supernova may radiate more energy in a few days than the Sun does in 100 million years, and the energy expended in ejecting material is much greater even than this. In many cases, including the Crab nebula supernova, the stellar remnant left behind after the explosion is a NEUTRON STAR--a star only a few kilometers in diameter having an enormously large d .....

.... and forty kilometers high in the stratosphere. The ozone layer reactions that both create and destroy ozone has come into a dynamic equilibrium. This dynamic equilibrium is very delicate and resulted during atmospheric formation (Environment Canada, 1996). Ozone, however, is very rare even in the ozone layer. Oxygen makes up approximately twenty percent of air and ozone makes up only 3 x 10-5 percent of air. Furthermore, this minuscule amount of ozone is enough to protect the earth from most ultraviolet light. Ozone prevents most UV-B radiation from reaching the surface of the earth (Environment Canada, 1996). Ozone is very important to life on earth b .....

.... but the algae are found growing free. There are about 15,000 different kinds of distributed worldwide. They are especially suited for growth in harsh regions, where few plants can survive. They grow farther north and south than most plants, as well as higher on mountains. One unusual type grows completely submerged in the cold coastal waters of Antarctica. Some inhabit the Earth's driest deserts, where they grow almost entirely underground and obtain light and moisture through small openings in the ground. Few grow near cities because most cannot survive in industrial air pollution. There are notable exceptions, however: in England, for example, Lecan .....

.... like the (appropriately lagged) rate of investment in computers and/ or other forms of “information capital” and the ratio of expenditures on research and development to sales on changes in the skill composition of industries (for examples, Berman, Bound and Griliches, 1994). The results of these studies are consistent with those of the case studies and the hypotheses that the recent technological change has shifted the relative demand for skilled labor to the right. Changes in production techniques have widened across the country quickly, especially the multinational firms. Thus, if technological change is an important determinant of relative demand shifts .....

.... It can help law enforcement officials determine whether any laws or regulations have been violated in the marketing of foods and drinks, the manufacture of medicines, or the use of pesticides on crops. It can also determine whether drinking water meets legal purity requirements. The medical examiner is the most important individual in an investigation of a crime involving a victim. It is the responsibility of the medical examiner to visit the crime scene, conduct an autopsy (examination of the body) in cases of death, examine the medical evidence and lab reports, study the victims history, and put all the information together in a report to .....

.... that are decreasing their survival and slowly pushing their species to extincintion? are an endangered species and it is said that less than a dozen have been seen in India in about a hundred years. In fact no sightings have been reported since 1951. This may be caused that the Royal Bengal tiger population has dropped from 40,000 to 1, 800 in the past ten years, and as few as 1 in every 10,000 tigers is white (www.cranes.org/whitetigers.com). are neither albinos nor a special species; they differ from the normally colored tigers by having blue eyes, a pink nose, and creamy white fur with black stripes. Tiger’s stripes are just like a human fing .....