.... by adopting these newer, safer methods. A main source of energy that could lead the way for the near future is solar energy. It is clean efficient and is already a large part of American and Canadian electricity production. "Solar energy already supplies about 6% of the nation's [U.S.A] energy ... the industry is still in an embryonic stage, and opportunity exists for increasing this contribution by ten times from current levels." (Maidique, 92) It is obvious that solar power will become a large part of the electricity production around the world. With future expansion and newer solar cells, the power production could be increased .....

.... gun. It has killed millions, not only in wars, but in everyday life as well. In addition, there is the atomic bomb that killed thousands at Hiroshima. More recently there is the nuclear missile that is capable of wiping out an entire major city. Moreover, there are many inventions that have been built with the intent to improve life only to repeatedly take it away from people. Some such inventions are cars, planes and nuclear power plants. Something must be done to hinder the advancement of technology in these areas before we are all dead. Lastly, technology is the biggest source of pollution. This pollution poses the .....

.... link to infertility either. Nor does it have an effect on a pregnant woman and/or her unborn child. In addition all of the talk that says will stunt a child's growth is just rumors. is said not to affect children any differently then it does adults. In another article entitled Coffee may not be so bad… in Science News, November 25, 1995, the author thinks that is an energy booster for athletes. At Oregon Health Sciences University a research team studied six healthy young men. The men rode exercise bicycles while the scientists recorded blood pressure. The participants then drank a double espresso, waited thirty .....

.... in, not pollution like carbon dioxide or greenhouse gases or other factors concerned with the global warming issue. The causes of environmental problems and the actual problems that were caused are the first subject that must be explored. Air pollution is by far the most serious pollution problem is eastern Europe. In general, the problem was caused by the burning of coal in industry and lead-based diesel non-desulferized petrol in cars. This resulted in very high amounts of sulfur oxides (particularly sulfur dioxide which is the number one pollutant), nitrous oxides, ozone, suspended particulates, carbon disulfide, and chlorine . .....

.... must exists. Therefore, for a close understanding of the circulation system that operates over China, we should start from discussing the seasonal pressure distribution at sea-level over the Asia-Pacific region, which is the driving force for the air movements in China. Most clearly to be seen, the largest difference in the atmospheric pressure occurs between winter and summer, whereby January and July can be considered as representative months. In January, a typical cold anticyclone with central pressure above 1,040 hectopascals (hPa) developed over mid-Siberia and Mongolia (Mongolian High); while a strongly established cycl .....

.... burned gasoline and liquid oxygen. It traveled only 56m (184 ft) but proved to the world that the principle was valid. Gossard Died August 10, 1945. Gossard did not work alone, he was also in partnership with a Russian theorist named Konstantin Tsiolkovsky. Tsiolkovsky was born on September 7, 1857. As a child Tsiolkovsky educated himself and rose to become a High School teacher of mathematics in the small town of Kaluga, 145km (90mi) south of Moscow. In his early years Tsiolkovsky caught scarlet fever and became 80% deaf. Together, the theoretical work of Russian Konstantin Tsiolkovsky and the experimental work of American Rober .....

.... of learned eccentricity and an unforced seeking of knowledge that Darwin's fascination for natural history and biology began." (D 6) However, growing up in the family home of Dr. Robert Darwin, was not exactly the most pleasant aspect of young Charles Darwin's life. After the death of his mother, Charles had become rather listless and buried himself in his work or in the pursuits of wealthy youth. The time after the loss of him mother was a wasted period spent in an institution which did not foster nor nurture the scientist we know of as Charles Darwin. The time he spent at Shrewsbury School was in Darwin's own words us .....

.... molecule is built. This is accomplished by an enzyme which travels along a portion of DNA between two exons and attaches the opposing base pairs to the backbone of the mRNA (a structure composed of phosphates and ribose). The nitrogen bases of this new molecule are identical to that of the opposite side of the original DNA molecule except that the thymine has been replaced with uracil. The formation of this molecule allows for the construction of proteins in the ribosome without risking the DNA in the cytoplasm. The mRNA travels through the cell to a ribosome. Here tRNA which contain the appropriate anti-codon collect the amino .....

.... of a mixture of two synthetic hormones similar to oestrogen and progesterone, the woman’s natural hormones which regulate the menstrual cycle. The pill is on of the most popular methods of birth control. How does it work? The pill basically prevents ovulation, therefore, the ovaries can’t release a mature egg. Without an egg for the sperm to fertilize , a woman cannot get pregnant . The hormones also increase cervical mucus, making it difficult for sperm to pass into the uterus. How effective is the pill? If used correctly, the pill is highly effective. It has a less than one percent failure rate. However, because ma .....

.... sulfur dioxide combines with water, the result is sulfuric acid. When nitrogen oxide gas combines with water, the result is also another acid. When the clouds releases rain or other precipitation, the acid goes with it. This is called acid rain. The level of acid is measured in pH levels. The pH scale begins at 0 and ends with 14. A reading lower than 7 is called acidic, and a reading higher than 7 is called basic. Seven is neutral. Normal rain is slightly acidic with a pH level of about 6.5. Rain with a pH of 5.5 is then times more acidic than normal rain and rain with pH of 4.5 is a hundred times more acidic than normal rai .....