11:05 PM 0 Comments »
POLLUTION
Pollution,
Emergence with such devastating evolution
In the face of the ever expanding globalization
Filled with development, riches, vision
But a price to pay for what nature has become
Of a barren, dead paradise once full of fulfillment
What can we say as to what can we really do
Or what can we really do to make a move
To prevent further devastation of this kind
From such expanding deterioration from happening in time
Is what we can rest assure of this disaster
Never to happen again ever after
Everybody knows about pollution, in fact it is a part of our lives today. But, what is the definition of pollution? Here are some:
- "contamination of the earth's environment with materials that interfere with human health, the quality of life, or the natural functioning of ecosystems" (Encarta.com).
- wrong substances in a wrong quantity in the wrong time and at the wrong place;
- agent which causes imbalances in the earth’s ecological equilibrium.
Natural pollution occurs naturally and won't cause excessive harm to our lives due to its regeneration ability. While the man-made pollution is caused by human activities, and hard to get rid of. The backbones of man-made pollution are human population and technology. Naturally human needs contact to the environment, we get resources from nature. This is for the sake of living. By the increase of human population, the contact is getting more intensive, because needs are increasing. And by the findings and development of new technologies, human can apply them to get the resources. And it's common that new technologies would bring their respective side effects besides their advantages.
Now you can see, small population with any level of technology wouldn't have to exploit the nature overwhelmingly. But big population with any level of technology will surely exploit the nature more, and even overwhelmingly, this is all for the needs of the people.
What we have to say about this problem? If we bring this topic out to people in general, politicians and industrialists alike, there is an immediate agreement that pollution is wrong and it must be prevented. But we have to ask ourselves, what is the degree of pollution globally now and the efforts taken to combat it. Is pollution now overpowering us? But we can be assured as the world goes on, zero pollution can never be achieved. At least, we should give an effort to minimize it, regardless of geographical boundaries.
Pollution is a growing pain. Pollution is not a problem that came suddenly from the sky, it's our fault and has been a part of our life through many years. Can you imagine living in a world where all the things we use are synthetics? Or, losing species that we haven't seen before, that actually can be used to cure cancer or AIDS? We must be wise in managing our resources, and take positive action towards preventing any forms of pollution to the environment. Make the world a better place to live.
And remember, the effort starts from you.
KINDS OF POLLUTION
1. AIR POLLUTION
Air pollution is indication of disturbances to the composition of compounds in the atmosphere, as it may be summarized as shown:
- excess emission of gases/vapors into atmosphere
- saturation of chemical compounds/particulates
- rate of dissipation < (smaller than) rate of absorption through various cycles (i.e. carbon and nitrogen cycle)
- emergence of new chemical reactions of reactive and non-biodegradable compounds.
In relation to this, we may observe the cycle which involves in our daily lives: carbon and nitrogen cycle. These 2 cycles are the most important of all, regulating the composition of carbon and nitrogen of Earth. Imagine the reverse is to happen....
Please click to view a comprehensive table explaining the major sources.
http://library.thinkquest.org/C0111040/Popups/pop_table_air1.htm
2. WATER POLLUTION
Water pollution is contamination of water by foreign matter that deteriorates the quality of the water. Water pollution covers pollutions in liquid forms like ocean pollution and river pollution. As the term applies, liquid pollution occurs in the oceans, lakes, streams, rivers, underground water and bays, in short liquid-containing areas. It involves the release of toxic substances, pathogenic germs, substances that require much oxygen to decompose, easy-soluble substances, radioactivity, etc. that become deposited upon the bottom and their accumulations will interfere with the condition of aquatic ecosystems. For example, the eutrophication: lack of oxygen in a water body caused by excessive algae growths because of enrichment of pollutants.
Water Cycle and Pollution
Water cycle is, simply saying, the circulation of water in earth. In fact, the water in the earth's biosphere is used and reused again and again. This is called water cycle or continuous movement of water between the earth and the atmosphere. It involves the following mechanisms:
- Evaporation: changing of water from liquid to gas
- Transpiration: Release of water vapor from plant leaves
- Condensation: changing of vapor to liquid (cooled down)
- Precipitation: Water that returns to the earth (water droplets in clouds become large enough and there comes the rain).
According to the water cycle, naturally, water around us will be absorbed to the land (soil) and rivers will stream from the upstream to the downstream and released to the sea. In normal situation organic pollutants are biodegraded by microbes and converted to a form that brings benefits to the aquatic life. And for the inorganic pollutants, in the same situation, don't bring to much hazards because they are widely dispersed and have almost no effect to the environment which they are released to.
In a small scale, both inorganic and organic pollutants safely decompose throughout the stream, their concentration decrease in the sea, and they don't harm the sea ecosystem and its distribution. But in an excessive scale, communities in beach and estuary will be affected by the pollutants, and can heavily harm them.
http://library.thinkquest.org/C0111040/Popups/pop_table_water1.htm
3. LAND POLLUTION
Revered to as soil pollution, land pollution involves the following mechanism:
- Deposition of solid waste
- Accumulation of non-biodegradable materials
- Toxification of chemicals into poisons
- Alteration of soil chemical composition (imbalance of chemical equilibrium to soil medium)
By as much, land pollution of this has amass globally, everyday threatening the very foundation and mechanical support of every matter on earth. Statistically, it has been shown that:
- loss of 6 million hectares of land per year
- loss of 24 billion tons of topsoil per year
- loss of minimum 15 million acres prime agricultural land to overuse and mismanagement
- desertification of land results in the lost of 16 million per square miles of world's land surface
- Unhealthy soil management methods;
- improper tillage of soil in which excessive tillage result in the deterioration of soil structure
- non-maintenance of a proper supply of organic matter in the soil from the imbalance composition of the reserves of organic matter especially nitrogen, phosphorus and sulfur unplenished supply after cultivation of vegetation, living the soil prone to soil infertility, unable to stabilize the soil physicality which ultimately let to desertification
- irregular maintenance of a proper nutrient supply of trace elements gives rise to the use of excessive synthetic fertilizers, which are non biodegradable and accumulate in the soil system which eventually destroys useful organisms such as bacteria, fungi and other organisms
- improper maintenance of the correct soil acidity which ultimately disrupt the adaptation of various crops and native vegetation of different soils as the solubility of minerals present will be affected. In a more acidic soil, minerals tend to be more soluble and washed away during rainfall while alkaline soil, minerals are more insoluble which form complex minerals unable to be absorbed into the flora system physiological usage.
- poorly drained soil result in salt deposits leading to high soil salinity that inhibit plant growth and may lead to crop failure
- unirrigated land giving rise to stagnation of agriculture waste products which accumulates and increases land toxicity and also decreasing
- irregular irrigation leads to decreasing moisturization of land for soil medium and replenishments of solvents for minerals
Please click to view a comprehensive table explaining the major sources.
http://library.thinkquest.org/C0111040/Popups/pop_table_land1.htm
4. NOISE POLLUTION
This particular pollution is ever increasing with due to the rise in the utilization of heavy duty machineries of industrial facilities and vehicles, synonymous to the increase in the standard of living in most countries. We make sounds practically every seconds of our day, but to the extend it has reached an unfavorable high intensity which had cause many disturbances and irritation to others emotionally that has adverse effects on our daily activities.
Decibel - one tenth of a bel where one bel represents a difference in level between two intensities I1, I0 where one is ten times greater than the other. Thus, the intensity level is the comparison of one intensity to another and may be expressed:
Intensity level = 10 log10 (I1/I0) (dB)
For instance, the difference between intensities of 10-8 watts/m2 and 10-4 watts/m2, an actual difference of 10,000 units, can be expressed as a difference of 4 bels or 40 decibels.
0 comments:
Post a Comment