radiation and broke down releasing chlorine and bromine into the ozone layer. The ozone layer is the earth’s ultraviolet shield. The chemistry is such that the chlorine and bromine attack the ozone‚ reducing it to ordinary oxygen which as no shielding effect from UV-B. The complex chemical reactions allow the chlorine and bromine to interact again and again with ozone molecules‚ until they eventually leave the ozone layer bonded to some other compound. Since the Montreal Protocol was developed to control
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Daly‚ A. and P. Zannetti. 2007. An Introduction to Air Pollution – Definitions‚ Classifications‚ and History. Chapter 1 of AMBIENT AIR POLLUTION (P. Zannetti‚ D. Al-Ajmi‚ and S. Al-Rashied‚ Editors). Published by The Arab School for Science and Technology (ASST) (http://www.arabschool.org.sy) and The EnviroComp Institute (http://www.envirocomp.org/). Chapter 1 An Introduction to Air Pollution – Definitions‚ Classifications‚ and History Aaron Daly and Paolo Zannetti The EnviroComp Institute
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In the world today‚ most people do not worry about diseases that are not in their country. There are millions of deaths each year because of malaria in Africa that is caused by a mosquito. Many of these deaths from this disease become unknown by the world. Malaria is a disease that kills many travelers and africans every year. Many wonder “what is malaria?”. Malaria has been studied by Malaria No More and they’re article says “Malaria is a disease of the blood that is caused by the Plasmodium
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Cause and effect essay Photography is an admirable hobby 2012/10/14 What hobby can record and influence one’s entire life? Photography can. In fact‚ photography is interesting enough to attract hobbyist across the ages. The reason for photography is an admirable hobby thanks to at least three dimensions‚ which are: it keeps memories in mind‚ changes the way how people observe world‚ and trains one’s patience. First of all‚ photography could help keep important memories in mind especially those
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SUBKINGDOM: PROTOZOA Phylum | SARCOMASTIGOPHORIA | APICOMPLEXIA | CILIPHORIA | Class | Class: LOBOZEA (amoeba)Species: ENTAMOEBA HISTOLITICA: * Only pathogenic parasite of this class * in large intestine * morphology: 1.trophozoite ; 2. Quadrinucleate cyst - 15 micrometers (smaller than 10 is ‘non-pathogenic’)‚ found in colon and feces‚ 4 nuclei * Life cycle: > parasite in caecum > mature cyst is swallowed > cyst hatches in intestine and quadrinucleated amoeba come
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Explain the causes of the Korean War The Korean War began in 1950 when Communist North Korea crossed the 38th parallel into Capitalist South Korea‚ however‚ it was not just an ordinary civil war‚ it involved 3 of the world’s biggest superpowers of the time‚ USA‚ China and Russia. Ultimately‚ their fight was indirectly played out in this small country. However‚ the main causes of the war can be debated. The cause of the war can be traced back to 1945 when the war ended and Korea was split between
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Describe the characteristics and explain the causes‚ of tsunamis. (8 marks) A Tsunami is a large and potentially destructive sea wave often produced by a submarine earthquake‚ subsidence or an underwater volcanic eruption. They occur when a large volume of water is displaced in the ocean. The characteristics of tsunamis differ slightly from normal sea waves. For one‚ they often have extremely long wave lengths‚ in deep water an initial wavelength can be up to 100km. Their amplitude contrasts with
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In Act Four Scene One Friar Lawrence explains the plan to Juliet‚ “ Take thou this vial‚ being then in bed‚ And this distillèd liquor drink thou off‚ When presently through all thy veins shall run A cold and drowsy humor‚ for no pulse Shall keep his native progress‚ but surcease. No warmth‚ no breath shall testify thou livest.The roses in thy lips and cheeks shall fade To paly ashes‚ thy eyes’ windows fall Like death when he shuts up the day of life. Each part‚ deprived of supple government‚ Shall
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Causes of Stress on a College Student College students experience a lot of stress because of different causes that affect their daily life. Here are some reasons on why college students are stressed. First‚ we have the stress caused by adapting to a new life. College students have a heavier workload compared to their high school life. It is also in this phase that we experience the letting loose of teachers and parents to college students that will result to their being more independent. In there
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Introduction I am a private tutor and one of my student is a little girl whom I teach going to her place. Last year during the end of August‚ I remember going to her place one day and her maternal grandmother was staying there at that time. While I was teaching her‚ her grandmother suddenly started crying and was bemoaning about what happened to her family. Since I have been teaching that kid for over 2 years‚ I became quite close to that family. I asked her mother what happened. She then told
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