.... up in the clouds for a long time. These clouds can be carried off by the wind to other areas, sometimes hundreds of miles away, where they eventually fall to the Earth as or snow. This is called transboundary pollution. For awhile some people believed that by building high smoke stacks they would be sending the chemicals out of harms way. But all this did was push the emissions higher into the air, where they remain longer and travel further. How Acid Rain Forms This diagram shows one way that acid rain is formed. Two major causes of acid rain are the chemicals sulfur dioxide (SO2) and nitrogen oxides (NOx). When large .....

.... pass through the filter of natural selection. Man was supplied with both physical and intellectual traits that were responsible for allowing him to surmount the other species living beside him. He was able to use his physical traits in order to become the greatest predator, and severely diminish the possibility of become another species prey. His physical traits were also very adaptable and so man was able to change with the environment and continue to flourish, as other species became extinct. Man was also able to use his mind to continue winning in the game of survival. He created society, which set him apart from his animal .....

.... From – crust of the earth, copper ores Atomic and Chemical Properties: In it’s usual state – atomic mass number 197 – gold is stable. However, there are radioactive (unstable) isotopes of mass number 186 to 196 and 198 to 203. Gold normally exhibits a chemical valence of one or three. Gold is the “noblest” of the noble metals (gold, platinum, palladium, and rhodium), so termed because of their inertness, or reluctance to enter into chemical reactions. Gold will not react with common acids but is attacked by a three-to-one mixture of hydrochloric and nitric acids. This combination is calle .....

.... making these germs is described in scientific literature and is no secret to terrorists. This germ warfare is an especially serious threat for several different reasons. The first reason is the ability of these germ agents to be undetectable to spy technology. Secondly, the warfare labs that are used to produce these germs are difficult to detect, and major nations sometimes work together collectively to produce these agents for use in warfare. Most importantly, it is against this threat that there may be no defense. Even though bioterrorism has been banned, it poses the greatest threat upon the Western World because of the mo .....

.... the need of the voice communication but after the appearance of data communications need the same network was used . From the time that electricity and electronics had developed there was rapidly changes at the section of the communications . After the decade of the 1950 the computers started developing , and the communications started playing an important role in peoples life . Also the evolution of the voice communication has created an extensive telephone network which today covers a very large part of the planet , and computers have taken advantage of that network in a great rate so as to satisfy their needs for data comm .....

.... of Jupiter. Galileo observed points of light that changed their positions with time around the Planet. These points he concluded were the four moons that orbit Jupiter. It showed that there were things in the heavens that Aristotle knew nothing about. The was not unique anymore because it wasn’t the only planet to have objects orbit it. And last but not least, Galileo saw that the Earth shines on the moon. It showed the Earth to be a little less celestial. The Earth can shine on another object like any regular object. It is not as special as initially thought to be. Aristotleans around the world did not want to accept the .....

.... to Greece on his back. Plutocrat wrote Thathos, Odysseus' son, was saved from drowning as a young child through the aid of a dolphin. A roman scholar Plink the Elder, who lived in AD 23-69, wrote about a boy named Hermias. Hermias had many encounters with a friendly dolphin which he would except rides from. One day Hermias was thrown off the dolphins back by a sudden storm and drowned in the sea. The dolphin brought the boy's body back to the shore, and the dolphin threw itself on the shore beside the boy, dying in grief over the boy's death. The sleek, smooth, streamline body of the dolphin doesn't begin to describe the phy .....

.... to create "designer" cattle. Also, in June of 1998, there was talk about having successfully cloned a mouse swept through the scientific community(Nash 3). These are just a few of many times scientists have cloned an animal. These are the many things science has brought fourth and we need to take advantage of them. After studying both sides of the issue, I believe human cloning is a good thing to peruse for our children's sake. One of the most popular arguments in support of cloning is that we can make people disease free and it could decrease the risk of birth defects. In other words, we can make a super human or the p .....

.... on land. Most of Earth's living space, is ocean, about 97%. And also 97% of Earth's water is ocean. There is a greater variety of living creatures in the ocean than anywhere on land. Scientists say that (including microscopic creatures) there may be 10 to 100 million unnamed species on the ocean bed alone. And that it could take up to 5000 years to classify them. The sea is a very has a very important contribution to human life. We shouldn't take the services that it provides, for granted. Like never before, in the past century, man has removed billions of tons of living creatures from the sea and dumped billions of tons of toxi .....

.... which iron is covered with zinc. (3) Covering iron with an air proof and also a water proof substance. This method is the least expensive, therefore it is the most common. The forming of rust is known as a chemical reaction. A chemical reaction is defined as a process by which atoms are redistributed, resulting in a change in the molecular composition of the substances. Rust is also known as iron oxide. Rusting is a chemical reaction that takes place rather slowly. Chemical Kinetics, the study of reaction rates, states that three conditions must be met in order for a reaction to take place: the molecules must collide; the mol .....