.... a comparable effect keeps the interior of the green house warm. Actually, the man role of the glass in a green house is to prevent convection currents from mixing cooler air outside with the warmer air inside. Although water is the most important factor in the greenhouse effect, is a major reason why human regions experience less cooling at night than do dry regions. Changes in both water and carbon dioxide play an important role in climate changes. For this reason many scientist have expressed concerns over the global increase of carbon dioxide in resent decades, largely as a result of the burring of fossil fuels. In many other factors of the earth’s present climate ....

.... created from here is that About 70 percent of acid rain comes from sulphur dioxide (SO2), which dissolves into the water to form sulphuric acid. The rest comes from various oxides of nitrogen (mainly NO2 and NO3, collectively called NOx). These gases are produced almost entirely from burning fossil fuels, mainly in power satations and road transport. (Kucera, (1973) The Challenge of Ecology, The Mosby Company.) Tremendous quantities of this nitric acid and sulfuric acid mix are reflected in the lowering of the acidity of rain. Earthworms (Annelids) are a species of worm which are many segmented. They live in damp soil, usually forming intricate tunnels beneath the surface. ....

.... muscular movement are not replaced once they are destroyed, virus infection can cause permanent paralysis. When nerve cells in respiratory centers, which control breathing, are destroyed, the victim must be kept alive by an iron lung (see Artificial Respiration). For every paralytic case of myelitis, however, there may be 100 nonparalytic cases. Treatment Because no drug developed so far has proved effective, treatment is entirely symptomatic. Use of moist heat coupled with physical therapy to stimulate the muscles was first initiated by the Australian nurse Elizabeth Kenny, and antispasmodic drugs are administered to produce muscular relaxation. In the convalescent st ....

.... three will describe the structure and replication procedure of viruses. Part one As stated by Prescott, Harley and Klein (1990) microbiology is the study of organisms that are usually too small to be seen with the naked eye. According to Jenson and Wright (1989) a pathogen is a disease-producing organism. They also describe microbes as organisms that are often too small to be seen without the aid of a microscope. Microbes, also known as microorganisms, can be broken down into four classifications that are bacteria, viruses, fungi, and protozoa. Prescott, Harley & Klein (1990) describe bacteria as prokaryotic cells (cells that lack a true membrane enclosed nuc ....

.... that the smallest part of a chemical compound was a molecule. He said that "All atoms of an element have the same chemical behavior, but different elements have atoms with different chemical properties." Scientists weigh gases by holding the same amount of a gas in a container and then wighing it. In the 20th century, most scientists used oxygen as the standard gas to compare other gases' weights. It is relativly easy to measure the weights of liquids and sloids, the same procedure for gas is followed, more or less. In the early 1960s, though, the international union of chemistry and physics agreed that there would be a new standard, carbon isotope (carbon-12). British phys ....

.... new agriculture technique can be done in deserts. Hugo Boyko and Elisabeth Boyko first used seawater agriculture after World War II. Many different crops have been tested such as barley and the date palm. The writers of this article however have been testing halophytes, which, is a salt-tolerant plant that can be used for food, forage and oilseed crops. They first gathered several hundred halophytes and began testing these plants in the desert of Puerto Peñasco. They irrigated the plants daily by flooding the fields with seawater from the Gulf of California. The best halophytes produced roughly the yield of alfalfa using freshwater irrigation. In order to show tha ....

.... After scientists got more into the study they started to dig deeper down. The fossils get so deep because of the years of rocks and dirt that were piled up on it. Some also get buried if a dinosaur were to die next to a river, and over the years the river probably changed courses a little, so therefore the bones would be covered up. They would actually be in the bank of the river. The Evolutionary theory states that everything evolved over millions of years. Evolutionists say that dinosaurs came from six million years back. They also say that the Earth is four to six billion years old. They say that fifty million years ago there was horses no bigger than dogs, and b ....

.... nearly 30%, methane concentrations have more than doubled, and nitrous oxide concentrations have risen by about 15%. Because of the increase of concentrations of these gasses, more energy is trapped within the Earths atmosphere, which is slowly increasing the average heat levels. Scientists predict that the average temperature will rise 1.6 – 6.3°F by the year 2100, which could wreak havoc with climates around the world. Why are greenhouse gas concentrations increasing? Scientists generally believe that the combustion of fossil fuels and other human activities are the primary reason for the increased concentration of carbon dioxide. Energy burned to run cars an ....