... 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 areas which used to be covered with forests are now gone, dead or dying (Baines, 21). Around the 1980’s more than half ...
... molecules in the upper atmosphere." Lightening and sparks from motors also convert oxygen to ozone ( Stoker 1). The question about the destruction of the ozone layer revolves around whether human-made CFCs (chloroflurocarbons) used in air- conditioners and refrigerators are breaking it down. This is the ozone thinning theory: "CFCs release chlorine into the stratosphere... leading to ozone destruction and exposing the planet to harmful ultraviolet rays." Critics who discount the thinning theory still say that chlorine comes from natural sources like volcanic eruptions and does no permanent damage (Brooks 422). NASA researches claim that they have evidence that s ...
... 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 three ways, through a pipe, a joint, blunt. A joint is a rolled piece of paper that is twisted at the ends. A blunt is normally an emptied cigar wrapper filled with marijuana. In a blunt you can fit much more marijuana. Though a blunt isn't always purely marijuana, it can be mixed with other drugs such as angel dust. The results are varied when someone smokes marijuana. Different people will get different result ...
... autism and its origin. The above example shows only a few examples of autistic behavior. The history of autism extends, as far back as the late sixteenth century; however, during that time it was not identified as this illness. Here is a statement from before the discovery of the illness: In 1799, a boy about eleven years of age was found naked in the woods of Averyron, France. He was dirty, covered with sores, mute, and behaved like A wild animal. Jean Itard, the physician of the new institution for deaf-mutes, Was given charge of the abandoned child. From Itard’s description, Victor Showed many features of autism—he did not look at people and never P ...
... are "bad". But these outside effects are instantly noticeable and people can react badly to you and thus make immediate bad impressions on people that you need to make a good impression on. Be it with a teacher, someone who is interviewing you for a job, or simply someone you are trying to get romanticly involved with. Then there are the more harmful and insidious side effects of smoking. Such as lung cancer, cancer of the throat, and other health problems too numerous to mention. Lung cancer has become very common amoung smokers and it is known fully by most smokers that they are getting cancer sooner or later as long as they continue to smoke as if it is an ine ...
... the reaction when the magnesium hits the acid when dropped in, it fisses and then disappears giving of hydrogen as it fisses and it leaves behind a solution of hydrogen chloride. The activation energy of a particle is increased with heat. The particles which have to have the activation energy are those particles which are moving, in the case of magnesium and hydrochloric acid, it is the hydrochloric acid particles which have to have the activation energy because they are the ones that are moving and bombarding the magnesium particles to produce magnesium chloride. The rate at which all reactions happen are different. An example of a fast reaction is an explos ...
... have an orange coat with dark brown or black stripes accented with white. Tigers that live in cold climates (Siberian tigers) have thicker fur than tigers that live in warm climates. A tiger's tail is 3 to 4 feet long, about half as long as its body. Tigers use their tails for balance when they run through fast turns. They also use their tails to communicate with other tigers. Where did tigers come from? Tigers (and all other carnivores) are descended from civet-like animals called miacids that lived during the age of the dinosaurs about 60 million years ago. These small mammals, with long bodies and short flexible limbs, evolved over millions of years into sever ...
... has accelerated rapidly because of human population growth and resource consumption (17). Today, most of the world's habitats are changing faster than most species can adapt to such changes through evolution, or natural selection. The current global extinction rate is estimated at about 20,000 species per year, exponentially greater than the background extinction rate (17). Many biologists believe that we are in the middle of the greatest mass extinction episode since the disappearance of the dinosaurs 65 million years ago (18). The survival of ecosystems (plant and animal communities and their physical surroundings) such as forests, coral reefs, or wetland ...
... - - - - Further reading: 1. John H. Schwartz, "Completing Einstein", SCIENCE 85, vol 6, pp 60-64, 1985. 2. Robert Palmer, "What's a Quark?", SCIENCE 85, VOL 6, pp 66-71, 1985 3. Bruce Schechter, "The Moment of Creation", DISCOVER, April 1983, pp 18-25. 4. Lawrence R. Sulak, "Waiting for the Proton to Decay", AMERICAN SCIENTIST, 70, 616-625, 1982. 5. Mary K. Gaillard, "Toward a Unified Picture of Elementary Particle Interactions", AMERICAN SCIENTIST 70, 506-514. - - - - The following background articles were downloaded from American Adacemic Encyclopedia via Dow Jones News Retrevial Servic ...
... Human and ecological systems are already vulnerable to a range of environmental pressures, including climate extremes and variability. Global warming is likely to amplify the effects of other pressures and to disrupt our lives in numerous ways. "Melting icebergs and expanding oceans may cause floods." The Intergovernmental Panel on Climate Change (IPCC) predicts that there will be an increase in sea level by the year 2100 of 1.5 feet . "Twenty Five percent of the world’s population lives less than 1.1 meters above see level." The IPCC also predicts that there will be " droug ...
