Реферат

Реферат на тему Landfills A Growing Menace Essay Research Paper

Работа добавлена на сайт bukvasha.net: 2015-06-06

Поможем написать учебную работу

Если у вас возникли сложности с курсовой, контрольной, дипломной, рефератом, отчетом по практике, научно-исследовательской и любой другой работой - мы готовы помочь.

Предоплата всего

от 25%

Подписываем

договор

Выберите тип работы:

Скидка 25% при заказе до 8.11.2024


Landfills: A Growing Menace Essay, Research Paper

Landfills: A Growing Menace

When asked to think of the largest man made structure, people will

invariably come up with an answer like The Great Wall of China, the Great

Pyramids, or the Taj Majal. In contrast to these striking achievements of

mankind is the Durham Road Landfill outside San Francisco, which occupies over

seventy million cubic feet. It is a sad monument to the excesses of modern

society [Gore 151]. One must think this huge reservoir of garbage must be the

largest thing ever produced by human hands then. Unhappily, this is not the case.

The Fresh Kills Landfill, located on Staten Island, is the largest landfill in

the world. It sports an elevation of 155 feet, an estimated mass of 100 million

tons, and a volume of 2.9 billion cubic feet. In total acreage, it is equal to

16,000 baseball diamonds [Miller 526]. By the year 2005, when the landfill is

projected to close, its elevation will reach 505 feet above sea level, making it

the highest point along the Eastern Seaboard, from Florida to Maine. At that

height, the mound will constitute a hazard to air traffic at Newark airport

[Rathje 3-4]. The area now encompassed by the Fresh Kills (Kills is from the

Dutch word for creek) Landfill was originally a tidal marsh. In 1948, New York

City planner 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 ended by stating, “It is at once practical and

idealistic” [Rathje 4]. One must appreciate the irony in the fact that Robert

Moses was considered a leading conservationist in his time. His major

accomplishments include building asphalt parking lots throughout the New York

Metro area, paved roads in and out of city parks, and the development of Jones

Beach, now the most polluted and overcrowded piece of shoreline in the Northeast

United States. In Stewart Udall’s book The Quiet Crisis, the former Secretary of

the Interior praises Moses. The JFK cabinet member calls the Jones Beach

development “an imaginative solution … (the) supreme answer to the ever-

present problems of overcrowding” [Udall 163-4]. JFK’s introduction to the book

provides this foreboding passage: “Each generation must deal anew with the

raiders, with the scramble to use public resources for private profit, and with

the tendency to prefer short-run profits to long-run necessities. The crisis may

be quiet, but it is urgent” [Udall xii]. It is these long term effects that the

developers of landfills often fail to consider. Oddly, the subject of landfills

is never broached in Udall’s book; in 1963 landfills were a non-issue.

A modern state-of-the-art sanitary landfill is a graveyard for garbage,

where deposited wastes are compacted, spread in thin layers, and covered daily

with clay or synthetic foam. The modern landfill is lined with multiple,

impermeable layers of clay, sand, and plastic before any garbage is deposited.

This liner prevents liquids, called leachates, from percolating into the

groundwater. Leachates result from rain water mixing with fluids in the garbage,

making a highly toxic fluid containing inks, heavy metals, and other poisonous

compounds. Ideally, leachates are pumped up from collection points along the

bottom of the landfill and either shipped to liquid waste disposal points or re-

introduced into the upper layers of garbage to resume the cycle. Unfortunately,

most landfills have no such pumping system. [Miller 527]. Until the formation

of the Environmental Protection Agency by President Nixon in 1970, there were

virtually no regulations governing the construction, operation, and closure of

landfills. As a result of this lack of legislation, 85 percent of all landfills

existing in this country are unlined. Many of these landfills are located in

close proximity to aquifers or other groundwater features, or near geologically

unstable sites. Many older landfills are leaking toxins into our water supply at

this very moment, with no way to stop them. For example, the Fresh Kills

landfill leaks an estimated one million gallons of toxic sludge into the

surrounding water table every day [Miller 527]. Sanitary landfills do offer

certain advantages however. Offensive odors, which characterized waste

depositories at one time are dramatically reduced by the daily cover of clay or

other material over the garbage. Vermin and insects are also denied a free meal

and the opportunity to spread disease by the daily layer of deposited clay.

Furthermore, modern landfills are less of an eyesore than their older

counterparts. However, the sources of these positive affects are the very

reasons for some of the significant drawbacks to landfills [Turk and Turk 486].

The daily compacting and covering of the garbage deposits squeezes the available

oxygen out of the trash. Whatever aerobic bacteria are present in the garbage

are soon suffocated and decomposition stops. Anaerobic bacteria, by their very

nature, are not present in appreciable numbers in our biosphere. What few manage

to enter and survive in the garbage deposits are slow-acting and perform little

in the way of breaking down the materials. In other words, rather than the giant

degrading compost heap most people imagine, a landfill is actually a huge

mummification center. Hot dogs and bananas, decades old, have been recovered

from landfills, still recognizable in their mummified state [Rathje 111-12].

What little decomposition does occur in landfills generates vast amounts of

methane gas, one of the significant greenhouse effect gasses. Some landfills

have built-in processes to reclaim the methane from the atmosphere. The Fresh

Kills landfill pipes methane gas directly into 12,000 homes, but in most

instances the gas is either burned off or leaked directly into the atmosphere.

Based on ice core samples from Antarctica, the methane concentration in the

Earth’s atmosphere, over the past 160,000 years, has fluctuated between 0.3 and

0.7 parts per million. The methane levels in the atmosphere are now triple

that.[McKibben 17-17]. It is not only the modern landfills that defy

decomposition. Because of the stench from the thousand year old refuse of an

ancient Roman landfill, an 1884 archaeological dig had to be halted periodically

so the workers could get fresh air.[Rathje 113] In today’s landfills

decomposition is negligible. While the total tonnage of garbage decreases over

years, due mostly to decay, the volume varies less than ten percent. Most of the

actual short-term rotting is from scraps of prepared food. Plastics present in

landfills will most likely be there forever. Even the most unstable plastic

requires intense sunlight to decompose, and sunlight is denied in a sanitary

landfill. Newspapers from before World War Two are still readable in these

landfills; they have in fact become important date markers for scientists

examining garbage strata in landfills [Rathje 112-13].

If burning garbage and dumping garbage at sea are unacceptable, what are

the alternatives? Of the landfills, sanitary and otherwise, open for business in

1979, 85 percent are now closed [Miller 527]. Where is all the garbage going?

Some municipalities are shipping garbage to other cities, or even other states,

a costly proposition. Larger metropolitan agencies have even taken to shipping

garbage to Third World countries who are strapped for cash and eager for the

money that comes along with the trash. This, of course, only transfers the

problem from one population to the other. Stories of wandering garbage barges

and orphaned garbage trains have appeared in American newspapers. Covert garbage

disposal has become a lucrative business, as the plethora of medical waste

washed up along the New Jersey shoreline proves. Despite these horror stories,

recycling really is making a difference. Newspapers, which used to make up 25 to

40 percent of the garbage volume of a typical city, are now effectively

eliminated from household garbage. Aluminum can recycling has become a

profitable enterprise, both for the economically disadvantaged and for the

average homeowner trying to offset the ever-increasing cost of garbage

collection. Construction waste is now barred from landfills in most areas; this

high volume material is now recycled or put to Earth-friendly uses, such as

making barrier reefs. Plans for the safe incineration of refuse to generate

electric power have presented some highly contentious issues. The ash from such

incinerators is normally highly toxic, since it concentrates existing toxins.

Citizens object to these plants, as long as they will be located in their

neighborhood. A clear-cut answer is probably non-existent. Several effective

programs enacted in unison is the only option that can stop the growing mounds

of trash that are piling up around the country.

Works Cited:

Gore, Albert. Earth in the Balance. New York: Houghton, 1992.

MacKibben, Bill. The End of Nature. New York: Random House, 1989.

Miller, G. Tyler, Jr. Living in the Environment. Belmont CA: Wadsworth, 1994.

Rathje, William and Cullen Murphy. Rubbish!. New York: Harper, 1992.

Turk, Jonathan. Environmental Science. New York: Holt, 1984.

Udall, Stewart. The Quiet Crisis. New York: Holt, 1963.


1. Реферат Процессы дифференциации доходов населения и их государственное регулирование
2. Реферат Теория Мальтуса и современность
3. Курсовая Институт Общественной палаты в России как элемент гражданского общества
4. Реферат Метод кейсов как сроедство формирования познавательного интереса учащихся при изучении темы quo
5. Курсовая на тему Финансовые основы пенсионного обеспечения
6. Шпаргалка Ответы по экономике общественного сектора
7. Реферат Гармония цветов в композиции изделий
8. Реферат на тему Natural Born Killers Essay Research Paper Adam
9. Контрольная работа на тему Ветеринарная радиобиология
10. Реферат A Passage To India Essay Research Paper