population
Human population in the past 48 years has more than doubled its seize, from 2.5 billion in 1950 to 5.9 billion in 1998 . A few month ago the Secrtary of the United Nation declared a baby as the No. 6 billion citezen of the earth. As you may have noticed, human population has reached a size that threatened our environment and the sustainability of the earth. Is the earth bounded to face this number of human? In fact, in the human history, human population increased stably over centruies until the Industrial Revolution. Thereafter, human population began to grow exponentially over decades. Unless death rate rates rise sharply, world population may reach 8 billion by 2025, 10-11 billionby 2050, and 14 bilion by 2100 . To sustain that many of people, the environment has already paid off. Population has a great impact on the environment. Deforestation, agricultural activities, and enviromental pollution, are either entirly or partly caused by the impact of human population. In th!is reseach paper, I will look these impacts, and state some perspective of the ecologists to these problems. AGRICUlTURAL ACTIVITIES IMPACT ON THE ENVIRONMENT Agriculture is not a direct way of human impact on environment. But in order to f
The expansion of agricultural land by cutting forest down wil lead to soil erosion. This will eventually reduce the sustainability of earth. Each year we must feed about 84 million more people with and estimated 24 billion metric tons(26 bilion tons) less topsoil, eroded as a result of human activities. The topsoil that washes and blows into the world's streams, lakes, and oceans each year woild fill a train of freight cars long enough to encircle the planet 150 times Many croplands that are now producing well be facing serious soil problem if current cultivation practices continue, because corn is relatively poor at holding soil, the corn-growing lands V about 7.5 percent of all lands in cultivation, producing roughly one-fifth of the world's grain V will fare the worst . As this consequence occrued, people will have to acquire more land by flating forests and hills, this has already became a harmful circulation. Although much remains to be laearned about the physical c! Population impact on water pollution is from disease-causing agents(pathogens), which include bacteria, viruses, protozoa, and parasitic worms that enter water from domestic sewage and untreated human and animal wastes . This is a problem which has confronted the human race since populations first concentrated in towns and cities . As world population greatly urbanized, the impact on environment is even greater. As cities grow and their water demands increase, expensive reservoirs and canals must be built and deeper wells drilled. The transfer of water to urban areas deprives rural and wild areas of surface water and sometimes depletes groundwater faster than it is replenished. Take a typical US city of 1 million people for example, average daily sewage output is 454 million kilogram. In the developing world , it is estimated that 90% of all sewage is discharged directly into rivers, lakes, and coastal waters without treatment of any kind . As a matter of fact, you might have! In the final stage in a slow and insidious process of land degradation and erosion, is desertification which starts with the loss of vegetative cover and ends with the destruction of the the soil's fertility and its transformation into barri
Some common words found in the essay are:
Industrial Revolution, Greenhouse Effect, ENVIRONMENT Energy, POLLUTION Population, Revolution Thereafter, United Nation, CO2 CFCs, Soviet Union, INTRODUCTION Human, ENVIRONMENT Agriculture, impact environment, greenhouse effect, carbon dioxide, human population, fossil fuels, population impact, world population, industrial revolution, agricultural activities, energy day demand, effect phenomenon, day demand energy, greenhouse effect phenomenon, impact water pollution, carbon dioxide atmosphere,
Approximate Word count = 1485
Approximate Pages = 6 (250 words per page double spaced)
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