... the acid, it has a harder time fighting off adversaries such as fungi, diseases, and frost so subsequently it dies. Around the 1970s the acid rain dilemma got worse, the acid rain has put trees in danger and now they are starting to die off. The effects of acid rain on a tree is shown if it has less foliage, yellow spots and produces many cones (Baines, 22). Secondly, acid rain damages the trees through the soil by releasing metals that harm them even further (Lucas, 72). Acid rain makes the trees lose their leaves, so when the trees try to regrow their leaves, buds come instead, this process is called a panic shoot (M. 15). Large land ar ...

... and cost of properly disposing of these products they are often emitted into the atmosphere with little or no treatment. The term was first considered to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not become acid over night. It happens over a period of many years, some times decades. The changes are usually to gradual for them to be noticed early. At the beginning of the 20th century most ...

... they are often emitted into the atmosphere with little or no treatment. The term was first considered to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not become acid over night. It happens over a period of many years, some times decades. The changes are usually to gradual for them to be noticed early. At the beginning of the 20th century most rivers/lakes like the river Tovdal in Norway had not yet ...

... to there being millions of other universes with intelligent life. Yet the only evidence of any extraterrestrial beings come from sightings by ordinary people. World governments tried to keep the phenomenon of extraterrestrial life forms secret. Due to the fact our society is gullible believing every myth that one might tell to another. This confidentiality only lead to more curiosity among the people. So far, in spite of a concerted effort by not only the U.S. government, but other governments worldwide to discredit the whole notion of unidentified flying objects; in spite of the ridicule heaped on anyone who even hints they may have seen something remotely re ...

... dioxin is responsible for the countless illnesses acquired by many Vietnam veterans because each individual has their own tolerance to dioxin (Vancil, 1). Many soldiers in the Vietnam War encountered repeatedly. Their lives revolved around the 55-gallon drums, which once were filled with an extremely harmful herbicide. Unaware of the possible consequences, many soldiers built showers and hibachis out of these discarded drums (Doyle, 139). They also used the barren drums to store potatoes and watermelons (Doyle, 139). One man described to his wife how they would bathe and swim in water contaminated with because their superior said it was safe (Brooks, 2). “ ...

... those questions and what actually makes up this new virtual world that we are creating for ourselves called cyberspace. In the 1950’s and 60’s the fear of nuclear attack was constantly on the minds of the American people and the government. The government therefore developed a corporation called RAND that they put in charge of making a network that could be protected from nuclear attack and could guarantee that we could still fire our own nuclear missiles in our defense. Soon major schools and corporations threw their hats into the race for a network in which information could be sent electronically. Throughout the seventies a couple of schools develo ...

... to its location, Aurora Borealis meaning the northern lights, and Aurora Australis meaning the southern lights. The general name for both is Aurora PolarisC since both displays occur at the earth=s poles. WHAT CAUSES AN AURORA? For many years, the ideas about what causes an aurora were left to old legends and unsubstantiated theories. The inuit believed that the northern lights were the spirits of dead relatives, dancing around in the sky, while the Vikings believed that they were caused by a fire on the edge of the world. In the fourteenth century, Aristotle described the auroras as jumping goats caused by the earth=s vapours being set on fire by meteors. Lat ...

... pitchblende( a chemical containing iron ore) mines were subject to fatal pulmonary diseases. An early study of the Schneeberg mines of Germany conducted between 1869 and 1877 found that 650 miners working in the mines had a life expectancy of 20 years after entering the mines. It was two german doctors, Harting and Hesse, who brought this to the public. The doctors found that 75 percent of the miner deaths were due to lung cancer. But with their scientific knowledge the doctors could only assume that the deaths were caused by the inhalation of arsenic. Later studies between 1900 and 1940 found that the deaths were caused by radiation in the mines. The radiation th ...

... when a super massive star has “used up” all of its nuclear fuel and then collapses under its own gravitational force. This happens because, as a star burns fuel, it creates an outward push, which counteracts the inward pull of gravity. Once the fuel is gone, the internal pressure of the star drops and it can no longer support its own weight. In a monstrous explosion, the outer layers are thrown off. And, at this same moment, the core collapses. This can happen rather quickly because gravity can crush an object 10,000 miles across to an object only 10 miles across in about one second. During the time that a black hole is created, the star shrinks down to an ...

... the connections and their magnitudes. Human population can be closely estimated and the consequences of their activities can be measured. For example, the volume of carbon dioxide, methane and nitrous oxide emissions is an indicator of human's energy and resource consumption. An examination of population size, atmospheric concentrations of these gases and global temperature relative to time and with respect to each other is presented here to demonstrate the relations among these factors. POPULATION GROWTH Many of us have seen linear graphs of human population showing the enormous growth in the last two centuries. However, significant changes in population dyna ...