.... the main sources for nitric acid(about 40% of the total), while power generating plants and industrial commercial and residential fuel combustion together contribute most of the rest. In the air, the sulphur dioxide and nitrogen oxides can be transformed into sulphuric acid and nitric acid, and air current can send them thousands of kilometres from the source.When the acids fall to the earth in any form it will have large impact on the growth or the preservation of certain wildlife. NO DEFENSE Areas in Ontario mainly southern regions that are near the Great Lakes, such substances as limestone or other known antacids can neutralize aci .....

.... when spores from a contaminated animal carcass inoculate an open wound. Then, the spores germinate and invade the blood stream, leading to death within 48 hours. Bacillus Anthracis is classified as a harmful, pathogenic bacterium. There is a vaccine for Anthrax in humans, but it produces no significant immunity. The vaccine is given primarily to people who work with livestock or in other businesses where workers must handle animal carcasses. The livestock version of the vaccine is very effective, however. The vaccine for both animals and humans is composed of sublethal amounts of toxin that induce formation of protective antibody. Frequent boosters are neces .....

.... 11 pounds of meat, grain and fish per person. In todays world, a billion people have been added to the population and the food supply has decreased to less than 10 pounds per week per person. The typical weekly diet in the U.S. is about 17 pounds, which means a significant number of the worlds people are eating considerably less than the average of 10 pounds per week. A world population of 10 to 11 billion by mid century will have an individual allocation of 6 to 7 pounds per week, equivalent to the diet of todays members of society living in poverty. Food projections are extremely uncertain since natural disasters are unpredictable and may increase if the for .....

.... and social costs of desertification damage may be two to three or even ten times as high (Atchia and Tropp, 1995). Desertification is the land degradation of productive drylands in arid, semiarid, and dry subhumid areas as a result of various factors, including climatic variations and human activities (World Atlas of Desertification, 1997) These drylands have been central in the evolution of mankind. These are the lands that sustained our transition from a hunting/gathering to pastoralism and agriculture (Kaya and Yokobiri, 1997). Drylands still provide much of our grain and livestock. These areas cover more than 40 percent of the world’s land surface. As .....

.... worry excessively about health, money, family, or work, even when there is no sign of difficulty. They also have trouble relaxing and they often have insomnia. Many live from day to day with distressing physical symptoms such as trembling, sweating, muscle tension, stomach pains, or headaches that tend to worsen when they face even mild stress (Harvard Health Letter, 1998) In 1994, generalized anxiety disorder (GAD) became an identifiable mental disorder with a DSM-IV diagnosis. The diagnostic criteria for GAD are: A. Unrealistic or excessive anxiety and worry about life circumstances for a period greater than 6 months, during which this person has .....

.... and stocky forelimbs are often a good way to differentiate between the two cats. In the wild, identification would not be an issue as the cats inhabit different continents - the jaguar is the only member of the panthera family to be found in the Americas and its is by far the biggest cat on the continent. The range, which once spanned from the southern states of the USA down to the tip of South America, now centres on the north and central parts of the South American continent. The jaguar is predominantly a forest dweller with the highest population densities centring on the lowland rain forests of the Amazon Basin - dry woodland and grassland also serve a .....

.... such as Lou Gehrig's disease, Huntingtons disease and dangerously high cholesterol. is a novel approach to treating diseases based on modifying the expression of a person's genes toward a therapeutic goal. has been discussed in the context of treating lethal and disabling diseases although it also has a potential for disease prevention. is in its formative stages, being investigated in basic research laboratories. A number of early human clinical trials have been initiated to test important concepts that have emerged in these laboratory studies. The reasoning for lies in our understanding of the genetic basis of human disease. It is probably safe to say t .....

.... is between 0.1 and 0.5 per 1000 depending on the diagnostic criteria used - representing a lifetime risk of 1 per cent (Strange, 1992). Onset of the disease is most commonly in late adolescence or early adulthood. In the U.S.A., schizophrenia fills more beds than almost any other illness and the financial cost of schizophrenia due to direct medical costs, lost productivity and Social Security pensions is between $30 billion and $48 billion according to Federal figures (American Pychological Association (APA), 1996). There are many theories about the aetiology of schizophrenia, but research has failed to pinpoint the origins. There is evidence t .....