|
|
|
|
Environmental Crisis
... growth, which has lead to apathy and inaction with regard to the
wasteful consumption of resources. Examples are the desertification of the Sahel
in Africa, the one child policy in China and the mis-management of our oceans.
The Sahel is a strip of land that extends for more than 6000 kilometres across
the southern edge of the Sahara desert. It stretches from Senegal and
Mauritania in the west to Ethiopia and Somalia in the east. These nations are
among the world's poorest.
The area is one of social and biophysical crisis because of the way the
population are forced to live; they are destroying the productivity of the land.
The alarming rate of populati ...
|
The Theory Of Evolution
... primary components, and formed amino acids. Eventually, these amino acids drifted into the sea, and combined to form proteins. In this way, the ocean became an "organic soup". Eventually, the proteins in this "organic soup" joined, a membrane grew around the proteins, and the first complete cell was formed (Dawkins 16). According to evolution, this process was the beginning of life.
But, there are minimal chances that this organic soup would form. Consider the experiment of Stanley Miller. In 1953, Stanley Miller passed an electric spark through an atmosphere of hydrogen, methane, ammonia, and water vapor; an atmosphere similar to the so-called "primitive atmosphere ...
|
Botany And Botanists
... products made from plants. If one were to try and pin-point the most important thing a botanist does, it would be impossible. They do so much for us, yet get little recognition for it. Whenever you take an aspirin, eat some vegetables, or even sleep in the house that was once built, you can thank a botanist for it all.
Many people, such as myself, would wonder why someone would want to be a botanist. The main reason anyone can name is that plants have intrigued people for thousands of years. Plants are used for decoration, as well as our basic needs, such as: food, shelter, and even the air we breathe. Today, our world requires new needs for plants. Increasin ...
|
Plutonium
... contributed to the discovery
of three more radioactive elements, Einsteinium (Es), Mendelevium (Md), and
Nobelium (No). Plutonium was Seaborg’s first discovery. Its name came from
Pluto, the planet after Neptune for which Neptunium was named. In 1940, at the
University of California at Berkeley, he bombarded a sample of Uranium with
deuterons, the nuclei in atoms of deuterium, transmuting it into plutonium.
Shortly after, Seaborg was able to isolate plutonium 239, an isotope used in
atomic bombs.
Plutonium is a highly dangerous and poisonous element because it rapidly
gives off radiation in the form of alpha particles. Alpha particles, which are
identical to ...
|
Hurricanes
... 20 per year. Fortunately for those living in the coastal regions
of the southern and eastern United States, fewer than five hurricanes, on
the average, develop each year in the warm sector of the North Atlantic.
Although hurricanes are most noted for their destruction, some
parts of the world, especially eastern Asia, rely on them for much of their
precipitation.
Although numerous tropical storms develop each year, only a few
reach hurricane status, which by international agreement requires wind
speeds in excess of 119 kilometers per hour and a rotary circulation.
Hurricanes average 600 kilometers in diameter, and often extend 12,000
meters above the oce ...
|
Cardiovascular Disease
... 1993). Moderate regular exercise, lasting say 15 to 30 minutes, five times a week also has been found to improve health. In fact, high levels of exercise increase the risk of injuries (Edlin p.130 ).
If you exercise regularly, your overall risk of a heart attack is about 50 percent less than if you are inactive and out of shape. With routine exercise you can reach a level of physical fitness comparable to an active person ten to twenty years younger. Regular exercise may also lower your cholesterol and blood pressure, and reduce the risk of diabetes.
Exercise increases the size of coronary arteries and reduce clogging due to atherosclerosis. Exercise also increa ...
|
Household Waste!
... example of common mistakes people make when dealing
with household chemicals/cleaners. In this assignment I will examine different
cleaners commonly used in my house.
I Ajax
I go to the cupboard and find a can of the powder, Ajax. The can use to
have a piece of tape to cover the top but now it has been lost; a potential
problem. The can has an expiration date on it, 9/98. This expiration date may be
incorrect because that piece of tape to cover it has been lost for some time now.
II Windex
In the cupboard in the upstairs bathroom is where we keep the Windex.
The Windex is blue and clearly labeled, with no chance of any person mistaking
it for something e ...
|
Keeping The Snake River Dams
... about, and the economic impact of what will happen. I will end my speech by reinforcing one of the purposed solutions.
As I have stated before in 1992 there was a changing event when four species of salmon were placed on the Endangered Species List. According to a Protecting the Environment ’99 article “A look at the impacts of removing dams” by Chris Fowler, it states, “The listing triggered a series of events which have led the Army Corps of Engineers to consider the removal of four dams on the Lower Snake River.” There is no disputing the fact that the number of native salmon swimming in the rivers and streams of the Pacific Northwest are dangerously low level ...
|
ESP
... parapsychology. This is also called psychical research, or psi for short. Besides , there is another branch of psi communication which includes the phenomenon in which an object seems to be moved by the mind alone. The mover does not touch the object which can be living or non living. This is called psychokinesis or PK.
There are three accepted types of , clairvoyance, precognition,and telepathy. Clairvoyance is the extra sensory perception of events that are taking place at the exact time of the perception, but the sensor cannot know of these events through any of the five senses. Precognition is the extra sensory perception of events in the future. And fina ...
|
Chlorofluorocarbons (CFCs)
... and CFC-12.
CFCs are released in relatively small quantities, but one kilogram
of the most common CFCs may have a direct effect on climate 1000 times
large than that of one kilogram of carbon. In addition over the last two
decades the percentage increase of CFCs in the atmosphere has been higher
than any other greenhouse gas. By 1990 the increase was 4-12% a year.
CFCs also destroy ozone - itself a greenhouse gas - their net
effect on climate is unclear. The strength of the indirect effect of ozone
depletion depends on variables such as temperature of the upper atmosphere
and cannot yet be measured with any confidence. According to new research, ...
|
Browse:
« prev
32
33
34
35
36
more »
|
|
|