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Search results 51 - 60 of 5332 matching essays
- 51: Man-made CFCs are Jeopardizing our Future
- ... levels in Toronto rose 6 % each summer and 35% each winter between 1989 and 1993. In southern Argentina, UV levels were 45% above normal from September 1990 to March 1991 (Gurney 58). An extremely harmful effect of the UV radiation increase is the increase of human skin cancer and an the impairment of the body's immune system. Melanoma, a form of skin cancer that causes the most fatalities, is connected ... the temperature is also rising because of the CFCs trapping heat radiated from the ground (CFCs work as gases that block the escaping of "ground heat" and other gases from the atmosphere, therefore they are greenhouse gases). The trapping of heat will cause global temperatures to rise. Since the poles will warm more than the tropics, wind circulation patterns will change, with drastic effects on agriculture. The greenhouse gases are predicted to increase earth's temperature an average of 3 to 8 degrees Fahrenheit by the 2030s, which has never been experienced by the human species (Begley 64 - 65). The most dramatic ...
- 52: Effects Of Marijuana
- ... is found all over the world, including the US. There are three different types of Indian Hemp. They are Cannabis Sativa, Cannabis Indica, and Cannabis Rudderalis. These three plants vary in size and mood altering effect. The hemp plant has many uses and has been farmed for centuries. Marijuana can be taken in three ways, by eating, made into a tea, or smoking (the most popular). Smoking it can be done ... and certain types of cannabis can cause different effects. The amount of THC (marijuana's main active chemical) may also change the result. If alcohol, or other drug use is occurring while smoking marijuana, the effect could be different. A first time marijuana smoker will probably feel no effect. A chronic or heavy user will get a high (intoxication). When a person is high, normal sights, sounds, tastes, or events can seem very funny or interesting. When intoxicated, time seems to pass a ...
- 53: Lsd
- ... behavior. It will then discuss some of the neural populations and neurotransmitters that are believed to by effected by LSD. The paper will conclude with a more detailed discussion of possible ways that LSD can effect the neurotransmitter receptors which are probably ultimately responsible for its LSD. A Brief Foray Into Philosophy and the Cognitive Sciences Modern physics is divided by two descriptions of the universe: the theory of relativity and ... Parkinson's disease can be traced to problems in dopaminergic pathways. Serotonin has been implicated in the etiology of various CNS disorders including depression, obsessive-compulsive behavior, schizophrenia, and nausea. It is also known to effect the cardiovascular and thermoregulatory systems as well as cognitive abilities such as learning and memory. The lack of knowledge in the middle ground between neurobiology and psychology makes a description of the mechanisms of hallucinogens ... the majority of norepinephrine neuronal input in most brain regions.4 It has axons which extend to a number of sites including the cerebellum, thalamus, hypothalamus, cerebral cortex, and hippocampus. A single LC neuron can effect a large target area. Stimulation of LC neurons results in a number of different effects depending on the post-synaptic cell. For example, stimulation of hippocampal pyramidal cells with norepinephrine results in an increase ...
- 54: Marijuana Effects
- ... is found all over the world, including the US. There are three different types of Indian Hemp. They are Cannabis Sativa, Cannabis Indica, and Cannabis Rudderalis. These three plants vary in size and mood altering effect. The hemp plant has many uses and has been farmed for centuries. Marijuana can be taken in three ways, by eating, made into a tea, or smoking (the most popular). Smoking it can be done ... and certain types of cannabis can cause different effects. The amount of THC (marijuana's main Active chemical) may also change the result. If alcohol, or other drug use is occurring while smoking marijuana, the effect could be different. A first time marijuana smoker will probably feel no effect. A chronic or heavy user will get a high (intoxication). When a person is high, normal sights, sounds, tastes, or events can seem very funny or interesting. When intoxicated, time seems to pass a ...
- 55: The Dangers of Smoking Marijuana
- ... is found all over the world, including the US. There are three different types of Indian Hemp. They are Cannabis Sativa, Cannabis Indica, and Cannabis Rudderalis. These three plants vary in size and mood altering effect. The hemp plant ha s many uses and has been farmed for centuries. Marijuana can be taken in three ways, by eating, made into a tea, or smoking (the most popular). Smoking it can be ... and certain types of cannabis can cause different effects. The amount of THC (marijuana's main active chemical) may also change the result. If alcohol or other drug use is occurring while smoking marijuana, the effect could be different. A first time marijuana smoker will probably feel no effect. A chronic or heavy user will get a high (intoxication). When a person is high, normal sights, sounds, tastes, or events can seem very funny or interesting. When intoxicated, time seems to pass a ...
- 56: The Effect of Viewing Television Violence on Childhood Aggression
- The Effect of Viewing Television Violence on Childhood Aggression Abstract There is a great deal of speculation on the effect television plays in childhood aggression. Two contrasting views regarding this issue are violent television increases aggressive behavior and violent television does not increase aggressive behavior. Later research demonstrates there may be other intervening variables causing ... need of additional investigation. 1970's Research Up until now the relation between television viewing habits and aggression had been shown in several experiments, but what was lacking was the ability to determine cause and effect. One possible way to demonstrate cause and effect is to use a longitudinal context (Eron, Huesmann, Lefkowitz & Walder, 1972). In Eron et al. (1972) subjects were tested over a ten year time period for ...
- 57: Environmental Isuues
- ... be addressed. The main cause of this issue is human behavior. With humans being a more advanced population, they also increase the production of a major climate-changing factor. This factor is the overproduction of greenhouse gases. Increased population, causes the increased production solid waste that is harmful to the environment. Fossil fuel burning is also a result of human behavior, which contributes to the production of the greenhouse gases. The overproduction of greenhouse gases is the immediate issue that must be addressed to increase knowledge of the increased climate change. The greenhouse gases are gases that are responsible for the heat trapping capability of the atmosphere of ...
- 58: Air Pollution
- ... on limestone and marble at large distances from the source. The worldwide increase in the burning of coal and oil since the late 1940s has led to ever increasing concentrations of carbon dioxide. The resulting "greenhouse effect", which allows solar energy to enter the atmosphere but reduces the remission of infrared radiation from the earth, could conceivably lead to a warning trend that might affect the global climate and lead to a partial melting of the polar ice caps. Possibly an increase in cloud cover or absorption of excess carbon dioxide by the oceans would check the greenhouse effect before it reached the stage of polar melting. Nevertheless, research reports released in the U.S. in the 1980s indicate that the greenhouse effect is definitely under way and that the nations of ...
- 59: Air Pollution 2
- ... big role on polluting this essential resource. Air pollution may not be as dangerous in its direct outcome as nuclear or water pollution can be, but in the long term it will have an tremendous effect on the environment and health of its organisms living in. Asthma, cancer, acid rain, and the disability to photosynthesize are only a few causes of air pollution.The atmospheric pollutants with the greatest effect onto the environment are the carbon monoxide, carbon dioxide, hydrocarbons, sulfur dioxide, nitrogen oxides, dust particles, radioactive isotopes, and chlorofluorocarbons. The major sources that enable carbon monoxide to enter the atmosphere are the exhausts of cars, the burning of fossil fuels, and the oxidation of natural methane. Carbon dioxide is caused by the consumption of fossil fuels only and it causes the possible greenhouse effect which has global warming as an outcome. Hydrocarbons are caused by the combustion of oil and petrol and it effects the environment with carcinogen. Carcinogen is a chemical agent that causes cancer. Sulphur ...
- 60: Could Gambling Save Science: Encouraging an Honest Consensus
- ... usually right -- to be rewarded through informal reputations. Perhaps our biggest problem is the distortion evident when a science question becomes relevant for public policy, as in the recent debates over "Star Wars" or the greenhouse effect. The popular media tend to focus on those scientists prone to hyperbole. An honest consensus of relevant experts is often lost from public view, as advocates on each side accuse the other of bias and ... only go so far in countering bad incentives; if you must publish or perish, you will do what it takes to publish (or perish). The social organization of any human effort can have a tremendous effect on its efficiency. Consider that different past societies with different ways of organizing science have had very different rates of scientific progress; compare Europe with China over the last five centuries. Our rate of ...
Search results 51 - 60 of 5332 matching essays
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