Endangered Species Study: Jaguars
.... a life that is doing no harm to the eco-system. A jaguars' way of living
is much like that of a human, you don't see jaguars killing humans for their
skin.
III. Any endangered specie, including the jaguar, has many different
alternatives in which the government or a national group would have to be
involved. There are several organizations that help the breeding and life of
many species. One way of breeding a specific species would be to freeze sperm
and embryos so that scientists may breed more of the species when they are close
to extinction.
IV. I feel that the jaguar can be saved by forcing contractors to move their
con .....
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Landfills: A Growing Menace
.... Robert Moses developed a highly praised project to deposit
municipal garbage in the swamp until the level of the land was above sea level.
A study of the area predicted the marsh would be filled by the year 1968. He
then planned to develop the area, building houses and attracting light industry
over the landfill. The Fresh Kills Landfill was originally meant to be a
conservation project that would benefit the environment. The mayor of New York
City issued a report titled "The Fresh Kills Landfill Project" in 1951 which
stated, in part, that the project "cannot fail to affect constructively a wide
area around it." The report e .....
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Malibu Fires
.... perfect prey to
wildfires. Initially, wildfires were put out immediately and people were barred
from setting fires in open spaces. Due to the policy of fire suppression, only
one percent of all wildfires escaped early control. The land was safe from
fires temporarily, but this set the stage for catastrophe as the brush grew more
dense.
There have been more than 20 catastrophic wildfires in Los Angeles
County since the beginning of organized fire protection. The first "big one"
happened in December of 1927. The fire started in the La Crescenta Valley,
climbed over the Verdugo Mountain range and destroyed more than 100 home .....
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Management Techniques For The Red-Cockaded Woodpecker On Federal Lands
.... or
family groups that usually consist of one breeding pair and 2 non-breeding male
helpers (Jackson, 1986 ). This group establishes and defends a territory that
includes foraging habitat and nesting "cavity trees" (Copeyon et al., 1991;
Jackson et al., 1986; Rossell and Gorsira, 1996). Red-cockaded woodpecker
clans excavate cavities in living pines, and have established a living and
foraging routine in conjunction with the southeastern pine forests and the
historical occurrence of fire, which reduces hardwood understory while sparing
fire-resistant pines (Jackson, 1986). Much of the prime nesting and foraging
habitat for .....
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Manatees
.... This feature made people
confuse manatees with mermaids for nearly four centuries (O'Shea 66).
Many biologists say that manatees possibly originated or evolved from
ungulates such as elephants and cows because of the way that they are built, and
certain features that they have in common. Like elephants, manatees have the
peculiar half-moon shaped fingernails, and thick, wrinkled skin. Manatees also
shares some traits with cows. The way the manatees spend all day lazily grazing
on the ocean floor is incredibly similar to the behavior of cows at a pasture
(Breeden 58).
Manatees eat an outrageous amount of food, they consume appr .....
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Natural Resources And Management
.... this time span into prehistoric and
historic periods. The prehistoric period extends from the earliest arrival of
humans in North America to the coming of the European explorers. The historic
period begins with the arrival of these explorers and continues up to the
present.
As you walk across public land, something on the ground catches your eye.
You pick up a piece of pottery or an arrowhead, wondering about the people who
made this artifact. Who were they? When did they live? How did they live?
If you return the artifact to where you found it, you have left in place
a clue that could help us answer these questions. If yo .....
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Nuclear Weapons
.... Union to limit the numbers in nuclear weapons.
In 1982, the United States and the Soviet Union began the Strategic Arms
Reduction Talks(START). Unlike the SALT talks, these were aimed at the number
of nuclear weapons each country could obtain. Then there was another treaty
signed in 1987 which was called the Intermediate Range Nuclear Forces(INF).
This treaty called for the dismantling of ground-launched nuclear missiles.
A major obstacle to controlling nuclear weapons has been a lack of trust
between the two principal powers; the United States and the Soviet Union. The
relationship has improved though in the late 1980Ős afte .....
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Smuggling Of Nuclear Material
.... back then where well disciplined and
each individual new his/her role. The workers were among the best treated and
loyal to the Russian military. They are now suffering hardships and are forced
to scavenge anything to pay for their food, rent and social services.
A new trend is already occurring with some of the workers . There are
those that will seek employment out of the nuclear field and in the commercial
sector, where salaries are higher. Then the unfortunate who lose their jobs and
find no work. The scarier thought is that the uncontempt people in Russia's
nuclear complex with access to nuclear materials will sell thems .....
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Nuclear Waste Management
.... 238U and 235U are present. When in the reactor, the 235U is gradually
depleted and gives rise to fission products, generally, cesium (137Cs) and
strontium (90Sr). These waste materials are very unstable and have to undergo
radioactive disintegration before they can be transformed into stable isotopes.
Each radioactive isotope in this waste material decays at its characteristic
rate. A half-life can be less than a second or can be thousands of years long.
The isotopes also emit characteristic radiation: it can be electromagnetic (X-
ray or gamma radiation) or it can consist of particles (alpha, beta, or neutron
radiation .....
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Oceans
.... under the misconception that the ocean is a hungry abyss,
eager to devour all their waste. These beliefs, however, are all untrue. The
average depth of the oceans is only a little more than a mile, when in fact,
some lakes exceed this depth rather handily. Although the size of the ocean is
often pondered, the thought that it may one day be gone, is never even
considered.
The vast majority of all life in the ocean, inhabits only 1/25 of these
waters, but it is these surroundings that are in the most danger. In the
beginning of the world, marine plankton was vital to the evolution of man.
Today, it is even more important to us, .....
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Our Radiant Planet- Depletion Of The Ozone Layer
.... radicals are also
primarily dangerous. As a result, the Ozone in the stratosphere has been reduced
to such an extent that ozone holes are appearing around the globe, in particular
one over Antarctica that in 1995 measured 8.2 million square miles. This
depletion has allowed more dangerous UV-B radiation to reach the earths surface.
So what effects will ozone depletion have on us? Although, at present, the
ozone layer blocks out most of the damaging UVB radiation received from the Sun,
a small amount slips by, damaging out skin in the form of sunburns and suntans.
UVB radiation is strongly absorbed in the skin and in the outer .....
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Ozone
.... (Environment Canada, 1996). Ozone is very important to life on
earth because the harmfulness of high-energy UV-B radiation stems from the high
energy of these light rays, enabling them to penetrate deeply into water, plant
tissue and epidermal tissue of animals. Increased UV-B radiation results in
harming the metabolic system of cells and ultimately damage to genetic material
present in effected cells. Living organisms on the surface of the earth have
always been exposed to some, and only slightly differing levels of UV-B
radiation depending of geographic location and season. Through evolution,
cellular repair mechanisms ha .....
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