 |
 |
Global warming 2 -
Global Warming
I have chosen to speak about Global warming because it is a major scientific issue in the media.
Problems facing the environment today are vast and diverse. Destruction of the world's rain forests, the depletion of the ozone layer, air pollution, water pollution, chemical pollution and global warming are just some of the problems that will reach dangerous proportions in the coming decades.
The three aspects of global warming I will discuss are:
What is global warming? What are the effects of global warming? What are we doing to reduce global warming?
Global warming is a greenhouse effect on the Earth. Solar energy is transmitted to earth by the sun. Excess energy should reradiate back into space through the earth's atmosphere. But, because of increased carbon dioxide and methane in the earth because of emissions from polluters such as factories and cars, excess energy is trapped in the earth's atmosphere and causes a warming of the earth called "Global Warming."
Starting in the mid-1700s, human activities began to alter the composition of the atmosphere. Vast supplies of charcoal, and later coal and oil, fed the growing fires of the Industrial Revolution. The carbon stored in these fuels was released to the air as carbon dioxide - a gas that traps heat in the atmosphere. Today, for every one of the more than 5.8 billion people on Earth, nearly six tons of carbon dioxide is spewed into the air every year. As a result of our activities, the gas trapped inside the atmosphere has risen by more than 30 percent in the last 250 years. These greenhouse gases which prevent infrared radiation from escaping into space, keep the earth's temperature warm. According to the British Meteorological Office the earth is getting warmer each year - In fact 1995 was the warmest year on record.
A lot of people say that ...
Computer Aided Drafting and Design CADD stands for Computer Aided Drafting and Design. By using the computer for the functions normally utilized by hand, a greater amount of efficiency can be attained. By drawing lines with a computer on a screen, corrections can be made without erasing the entire product. CADD is a lot like a word proc...
is a very common metal, still used widely today. It was first discovered by Hans Christian Oersted at Denmark in 1825. Oersted reacted aluminum chloride with potassium amalgam. Heating these two substances under reduced pressure caused the mercury to boil away, leaving aluminum metal as the final solution. Ancient Greeks a...
Prenatal alcohol exposure is a preventable cause of birth defects, including mental retardation and neurodevelopmental deficits. Since the initial recognition in 1968 of the multiple effects that alcohol can have on the developing fetus [1] and the subsequent delineation in 1973 of fetal alcohol syndrome (FAS), [2] it has become clear that pren...
The collective action of humans - developing and paving over the landscape, clear-cutting forests, polluting rivers and streams, altering the atmosphere's protective ozone layer, and populating nearly every place imaginable - are bringing an end to the lives of creatures across the Earth. Extinction of biological species is not necessarily a...
- Lightning, the thunderbolt from mythology, has long been feared as an atmospheric flash of supernatural origins. In the East, early statues of Buddha show him carrying a thunderbolt with arrows at each end. Indian tribes in North America believed that lightning was due to the flashing feathers of a mystical whose flapping wings produced the s...
Cardiac Pacemakers The heart is bestowed with a specialized system that automatically generates rhythmic control via the sinus node, located in the superior lateral wall of the right atrium near the opening of the superior vena cava. The specialized pacemaker cells dictate control of the rest of the heart through regular electrical impuls...
1. Explain why any one species cannot live everywhere. Any species cannot live everywhere because this would effect the natural balance. Also one species cannot adapt to all the different environments of our planet. For example a marine creature can only live underwater and cannot live on ground. 2. Explain how the activities of some spe...
DNA CHIPS AND THE PHARMACEUTICAL INDUSTRY INTRODUCTION When future historians look back on the greatest scientific advancements of the 20th century, they will without a doubt focus on only three events: the Apollo Moon landing, the invention of the microprocessor, and possibly the greatest scientific endeavor yet, genomics, the scienc...
Hypogravitational Osteoporosis: A review of literature. By Lambert Titus Parker. May 19 1987. (GEnie Spaceport) Osteoporosis: a condition characterized by an absolute decrease in the amount of bone present to a level below which it is capable of maintaining the structural integrity of the skeleton. To state the obvious, Human be...
Mars Mars,is a planet in the solar system.I'ts named for the Roman god of war Ares.Mars is the fourth planet from the sun.Mars has two small heavily craterd moons,Phobos and deimos,astronomers think they are areastroid like objects captured by the planet very early in history.Phobos is about 13 miles across;Deimos,is only 7.5 miles.Ma...
Fermentation of glycine, water, sucrose, galactose, and glucose as induced by yeast. ABSTRACT This lab attempted to find the rate at which Carbon dioxide is produced when five different test solutions: glycine, sucrose, galactose, water, and glucose were separately mixed with a yeast solution to produce fermentation, a process cells unde...
Virus What is a Virus? The computer virus is something that has been around almost as long as the Personal Computer (PC) and certainly since the advent of the affordable home computer, but what exactly is a virus? And how does it affect your PC? Is there any way to prevent your hard drive becoming infected and just where do they com...
Internet Security As we head into the next millennium many people are beginning to question the computer systems that so many of us depend on. This is not the first time that people have become scared at the end of a century, let alone a millennium. People have always had on thing or another to be worried about at these turning points in ti...
The purpose of this written report is to inform the reader about the concerns and facts involved with reforestation. began in Ontario after World War II. What happened was, professional foresters were assigned to an area and became responsible for its well being. Under the Crown Timber Act, long term management was prepared. T...
