An Essay On Environmental Degradation
Human Population Growth And Its Effect Environmental Sciences...
Population growth can be defined as an increase or decrease in the population size of living species including human beings. Human populatio...
An Essay On Environmental Degradation
Many thingsseem to follow as a matter of course when people live in cities,and wherever civilization occurred, it has involved politicalconsolidation, economic specialization, social stratification,some sort of monumental architecture, and a flowering of artisticand intellectual endeavor (childe, 1951). In other words, resources include all thethings found in nature that people use-not just the things peopleuse for survival, but things they use for any purpose whatever. Today, with extremely densepopulation and all parts of the world linked by air travel, newdiseases such as aids spread rapidly-and a virus as deadly asaids but more easily transmissible could appear at any time.
If the passage of homo sapiens acrossevolutions stage significantly alters earthsatmosphere, virtually all living things may become extinct quiterapidly. These people might get by, for a while, by pickingthrough the wreckage of civilization, but soon they would have tolead simpler lives, like the hunters and subsistence farmers ofthe past. Theexistence of autotrophs made a place for heterotrophs, which useenergy that has already been captured by autotrophs.
Animals pulled the plow,animals carried produce to market, and animals provided aprotein-rich complement to a diet of grain. These social constraints make itunlikely that fissions contribution to the worldsenergy needs will grow fifteen-fold in the next few years. A comparison of somatic andextrasomatic adaptation will show just how remarkable an abilitythis is if longer, sharper teeth are adaptive for a predator,animals with teeth that are slightly longer and sharper thanthose of their fellows will have a slight reproductive advantage,so that genes for longer and sharper teeth will have a slightlygreater likelihood of being passed on, and so, over the course oftime, the teeth of average members of the population will come tobe, little by little, longer and sharper.
We are caught up, as organic beings, in the naturalprocess through which the earth accepts energy from the sun andthen releases it. This may have been the innovation that let prosper and permitted his species to radiateout of the african cradle, pursuing game throughout the tropicsof the old world (binford, 1981, p. The complexassociation of cultural traits of which modern humans are soproud is a consequence of abundant resources, and cannot longoutlive their depletion.
Programmability -- the ability to learn -- is notunique with human beings, but they have developed the capacitymuch further than any other species. The cost of energy limited the growth of technologyuntil fossil fuels came into use, a little less than threehundred years ago. In the brief time since humans began livingin cities, they have used more and more energy to exploit moreand more resources.
And in its struggle to survive,the last generation uses up every scrap, so that nothing remainsthat would sustain even a small population. The exploitation of energy resources must entail a goodreturn on investment unless the energy they release isconsiderably more than the energy used to make them release it,they are not worth exploiting. Earths history, heterotrophs that could use more energyevolved to exploit them, is such aheterotroph indeed, the ability to use energy extrasomatically(outside the body) enables human beings to use far more energythan any other heterotroph that has ever evolved. Firewas used by in northern china more than400,000 years ago, and there is sketchy evidence suggesting thatit may have been used long before that (gowlett, 1984, pp. And as theworlds topsoil is lost -- at a rate of 75 billion tons ayear (myers, 1993, p.
Examining The Concept Of Green Economy Environmental Sciences...
Nature is important and valuable for us and it is our responsible to keep maintain it. By this, green economy is an economy when we are conc...
An Essay On Environmental Degradation
List of environmental issues - Wikipedia
This is an alphabetical list of environmental issues, harmful aspects of human activity on the biophysical environment. They are loosely divided into causes, effects ...
An Essay On Environmental Degradation
And in its struggle to survive,the last generation uses up every scrap, But even if a few people manage to surviveworldwide population collapse.
In this context, one would expect populations tofluctuate, and for species that have been studied, they generallydo (ecology texts such as odum, 1971 and ricklefs, 1979 giveexamples). The exploitation of all resources requires aninvestment in energy it takes energy to knap flint or drill foroil.
Today, The polluted water supply results in epidemic like cholera.
Of all thecarbon that has played a part in the life process, very littlewas separated out and held apart in this way, Thus, soil is getting heavily polluted day by day by hazardous materials and micro-organisms which enter food chain or water and are consequently ingested by man.
The notion of balance in nature is an integral partof traditional western cosmology. So we must give due attention to protect it from our own abuses.
essay on Environmental Protection - Blogger
In contrast, a humanhunter can imagine a longer, sharper arrowhead he can fashion itwith nimble hands and if it is really more efficient than theshort, blunt arrowheads that everybody else has been using, hispeers will soon adopt the new invention. When coal is burned to drive dynamos, for example,only 35 of its energy ultimately becomes electricity (ross &steinmeyer, 1990, p. As long as population continues to grow, conservation isfutile at the present rate of growth (1. By using extrasomatic energy to modify more andmore of its environment to suit human needs, the human populationeffectively expanded its resource base so that for long periodsit has exceeded contemporary requirements. Then human beings evolved,with the capacity to dissipate much of the energy that had beensequestered, partially redressing the planets energybalance.
Thus, the total extrasomaticenergy used in the world must be on the order of 407. Today, the extrasomatic energy used by peoplearound the world is equal to the work of some 280 billion men. Indiscriminate industrialization has resulted in urban migration and slum development, which in turn resulted in degradation of environment. Energy consumption in the united states is on theorder of 82. Similarly, the use ofclothes brought about a conservation of bodily energy that helpedmake possible the conquest of more temperate regions.
By the time of christ, it was 200 to 300million. In some instances, a population movedinto a new region with previously untapped resources in otherinstances the development or adoption of new crops, newtechnologies, or new social strategies enhanced production. Although it does not have toxic effect, it is largely responsible for green house effect and thus for global warming. As a result a threat to his life has been increased, due to the lack of healthy air and potable water and the imbalance established in the biosphere. But given enough time, todays forests couldbecome tomorrows petroleum, and given an astronomical sweepof time, the sun itself will burn out. When aspecies is introduced into a new habitat with abundant resourcesthat accumulated before its arrival, the population expandsrapidly until all the resources are used up. Solar thermal collection devices are only feasiblewhere it is hot and sunny, and photovoltaics are too inefficientto supplant the cheap energy available from fossil fuels. The population of the world reached two billion by 1930. They are more like the finiteamount of sugar in a vat or the plentiful but slow-growinglichens on st. Besides air, water and soil pollution, today we face noise pollution.In recent years mankind's consciousness has been aroused very strongly about the need for environmental protection and ecological preservation.
Voluntary Human Extinction Movement - WikipediaThe Voluntary Human Extinction Movement (VHEMT) is an environmental movement that calls for all people to abstain from reproduction to cause the gradual voluntary ...
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While developing technologies for the benefit of man, it is also essential to study simultaneously their impact on the environment so that cyclic processes, which the nature has devised for conservation of resources is not affected. But anyonewith a fast-breeder reactor can make nuclear weapons, so there isconsiderable political pressure to prevent their proliferation. In this context, one would expect populations tofluctuate, and for species that have been studied, they generallydo (ecology texts such as odum, 1971 and ricklefs, 1979 giveexamples). Thepopulation of the roman empire fell from 45 or 46 million, at itsheight, to about 39 million by 600 ad, and the european part ofthe empire was reduced by 25 (mcevedy & jones, 1978) Buy now An Essay On Environmental Degradation
The development ofweapons, for example, made it possible to focus somatic energy soas to obtain high-energy foods with much greater efficiency. Carbon monoxide is able to displace oxygen in the blood which in turn can result in cardiovascular and neurological effects. Towns and cities should be planned very carefully and stress should be given on planting of more trees. Localized episodes of such cultural elaborationhave always been associated with rapid population growth. Growth of yeast ina 10 sugar solution (after dieter, 196245).
These social constraints make itunlikely that fissions contribution to the worldsenergy needs will grow fifteen-fold in the next few years. This danger of pollution has been aggravated today due to atomic explosions in some advanced countries An Essay On Environmental Degradation Buy now
Earths history, heterotrophs that could use more energyevolved to exploit them, is such aheterotroph indeed, the ability to use energy extrasomatically(outside the body) enables human beings to use far more energythan any other heterotroph that has ever evolved. Today, the extrasomatic energy used by peoplearound the world is equal to the work of some 280 billion men. This allowed anexpansion of population similar to that of species introducedinto extremely, propitious new habitats, such as rabbits inaustralia or japanese beetles in the united states. But blue-green algae,which are among the earliest organisms documented in the fossilrecord, already employed the two-stage process that waseventually handed down to green plants Buy An Essay On Environmental Degradation at a discount
Thepopulation of the roman empire fell from 45 or 46 million, at itsheight, to about 39 million by 600 ad, and the european part ofthe empire was reduced by 25 (mcevedy & jones, 1978). Of all thecarbon that has played a part in the life process, very littlewas separated out and held apart in this way, but over the courseof millions and millions of years, it has mounted up. Butthe sumerians, the greeks, the romans, the mayas, and even theeaster islanders all experienced a surge of creative activity astheir populations grew rapidly. Even if world population could be held constant, inbalance with renewable resources, the creativeimpulse that has been responsible for human achievements duringthe period of growth would come to an end Buy Online An Essay On Environmental Degradation
Butthe sumerians, the greeks, the romans, the mayas, and even theeaster islanders all experienced a surge of creative activity astheir populations grew rapidly. Any gaseous material not considered a a normal constituent of air or excess of sulphur dioxide, carbon monoxide, nitrogen dioxide, dust etc. If famine were the sole mechanism of collapse, thespecies might become extinct quite suddenly. The children of the highly technological society into whichmore and more of the worlds peoples are being drawn will notknow how to support themselves by hunting and gathering or bysimple agriculture. And biomassconversion has little growth potential, since it competes forfertile land with food crops and timber Buy An Essay On Environmental Degradation Online at a discount
Sincethat time, a star had to live and die to provide the materialsfor the solar system -- which, itself, is several billion yearsold. But anyonewith a fast-breeder reactor can make nuclear weapons, so there isconsiderable political pressure to prevent their proliferation. Biomass is thoughtto account for about 15 of the worlds extrasomatic energy(wriiied, 1988111). Today, the extrasomatic energy used by peoplearound the world is equal to the work of some 280 billion men. This is a complexsequence of events that has a simple outcome.
And the use of any combination of resources thatpermits continued population growth can only postpone the day ofreckoning. In the fourteenth century, a yet largerand denser population in both europe and china provided ahospitable niche for the black death An Essay On Environmental Degradation For Sale
An example featuring mammals is provided by thereindeer of st. But if they will inherit such a polluted environment, life will be misery for them. The moreconcentrated a resource, the less energy it takes to make use ofit and the less concentrated a resource, the more energy ittakes. Consequently, the richest deposits of any resource areused first, and then lower-grade deposits are exploited, at anever-increasing cost. As oldgrowth timber vanishes, more and more energy isnecessary to make lumber and paper out of smaller trees.
Based on an average of estimates by willcox(1940) and carr-saunders (1936) as adjusted and presented inunited nations, 195312 united nations, 19936-7 and cia,1993422 For Sale An Essay On Environmental Degradation
When goods are plentiful, andparticularly when per-capita access to goods is increasing,social tensions are muted ethnically diverse populations oftenfind it expedient to live harmoniously, governments may beineffective and slow to respond, and little force is needed tomaintain domestic tranquillity. When we quarry limestone and sendit off to build public monuments, or when we mine coal and burnit to drive turbines, we are making use of a concentratedresource, and dispersing it. Raven, andcarl sagan, who read earlier drafts of this paper. In fact, the growth rate of the earths humanpopulation has already begun to fall (figure 5). Some resources may be usedeither way wood, for example, may be used as a constructionmaterial or burned in a wood stove, and petroleum may be used tomake plastics or to power cars Sale An Essay On Environmental Degradation
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