.... more on the total input of sulphur and nitrogen than on the acidity of each raindrop. · More than 90 per cent of the acid rain that falls over Norway originates in other countries. · Cuts in emissions have reduced the acidity of rain and snow recently. Total emissions of sulphur in Europe were reduced by more than 40 per cent from 1980 to 1993. In the same period, Norway's emissions were reduced by more than 70 per cent. · As a result of higher precipitation in recent years, sulphur deposition has not dropped as much as might be expected from the reductions in emissions. · Estimates of how much pollution the environment can absorb without damage are ca .....

.... types of species. Organic evolution is better known as the “theory of evolution.” There are three main theories of evolution, which are, the early theories proposed by Comte de Buffon, Baron Cuvier, and Lamarck, the synthetic theory, and the Darwin theory. In the 1700s, French naturalists, Comte de Buffon and Baron Cuvier concluded with the studies of fossils and comparative anatomy that life on earth had endured many changes through a long period of time. In the early 1800s, another French naturalist named Lamark, proposed the first complete theory of evolution. He observed through is observations, depending on the extent to which the use o .....

.... newton contributed to the field of chemistry along with what civilizations thought of chemistry. Then he talks about a pathologically shy, absentminded, stuffy, women-hating chemist. This man did make some discoveries about inflammable gas and proved water to be an oxide. The Element of Perfection Asimov talks about astronomers in the mid 1800's, and how they made the spectroscope. Only then does he start to mention a element a french chemist belived to be new or maybe just a heavier from of nitrogen. Inert gases and there liquefaction points are then listed along when they when fisrt liquefied by a chemist. Welcome, Stranger! This talks about the ra .....

.... and Western Europe. The effects of acid rain can be devastating to many forms of life, including human life. Its effects can be most vividly seen, however, in lakes, rivers, and streams and on vegetation. Acidity in water kills virtually all life forms. By the early 1990s tens of thousands of lakes had been destroyed by acid rain. The problem has been most severe in Norway, Sweden, and Canada. The threat posed by acid rain is not limited by geographic boundaries, for prevailing winds carry the pollutants around the globe. For example, much research supports the conclusion that pollution from coal-powered electric generating stations in the midwestern .....

.... state from which the universe rapidly expanded.1 The Big Bang was the start of time and space. The matter and radiation of that early stage rapidly expanded and cooled. Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is still expanding, as astronomers have observed. The Steady State model says that the universe does not evolve or change in time. There was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe .....

.... and their children will suffer because of our lack of concern, knowledge and greed. I read a short story the other day, about the people in a village having never heard the word cancer until they were run out of their homes and into the city area's. Years later, some of the people from this village are dying from disease. my point is that before they came to the cities, they had always died of old age ...) FIRST of all, it is important to know that the "greenhouse effect" is not a bad thing in itself. In fact, this planet would be a life-less waste land without its natural greenhouseing. There are a collection of gases called "greenhouse gases," which are .....

.... 509th Bomb Group at Roswell Army Air Field, Colonel William Blanchard, who later went on to become a four-star general and Vice Chief of Staff of the United States Air Force. That the weather balloon story was a cover-up has been confirmed by individuals directly involved, including the late General Thomas DuBose, who took the telephone call from Washington, D.C. ordering the cover-up. Numerous other credible military and civilian witnesses have testified that the original press release was correct and that the Roswell wreckage was of extraterrestrial origin. One such individual was Major Jesse Marcel, the Intelligence Officer of the 509th Bomb Group and o .....

.... theory states that positive pressure pushes up from the roots continuously and that force maintains a constant flow of water circulating throughout the plant. This constant pressure that exerts force from the water it takes from the ground, supposedly should provide enough power to continue the circulation and distribution of water efficiently throughout the entire plant. Proof of root pressure is exhibited through a process called guttation. Through guttation, tiny droplets of water are sometimes forced out of some plants. Guttation only works when soil is almost completely saturated with water and leaves are not losing much water through evaporation. Whe .....