a brief history of air pollution‚ its regulation‚ and trends of its ambient concentrations and emissions. Keywords: Anthropogenic‚ biogenic‚ geogenic emissions; primary and secondary pollutants; criteria‚ hazardous‚ radioactive‚ indoor pollutants; sulfur smog‚ photochemical smog; UN-ECE‚ US-EPA‚ Clean Air Act. 1 The Natural Environment and Some Definitions of Air Pollution The present-day atmosphere is quite different from the natural atmosphere that existed before the Industrial Revolution
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I. Introduction …………………………… 1 II. Body …………………………… 2 a. Definition …………………………… 2 b. Kinds of volcano …………………………… 2 c. Types of eruption …………………………… 3 d. Risk …………………………… 4 e. Benefits …………………………… 11 a. Tourism …………………………… 11 b. Environment …………………………… 13 III. Conclusion …………………………… 15 IV. Bibliography …………………………… 17 Introduction The term volcano can either mean the vent from which magma erupts to the surface‚ or
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Bee Pollinating a Peach Tree Flower. 2011. Web "Benefits and Costs of Pesticide Use." IAEA Bulletin 24.3: 39-41 Cruzan‚ Mitch. "Harmful Effects of Pesticides." Nature in the Neighborhood. N.p.‚ 2004. Web. 14 Sept. 2011. Gagnon‚ Steve. "The Element Sulfur." It ’s Elemental. N.p.‚ n.d. Web. 18 Sept. 2011. "Health Effects of Pesticides." Kids for Saving Earth. N.p.‚ 2003. Web. 13 Sept. 2011. "India’s Growing Malnutrition Could Be Ameliorated By Approving Biotech Crops and Pesticides ." America Council
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Extractive Metallurgy Minerals are naturally occurring chemical substances in the earth’s crust obtainable by mining. Out of many minerals in which a metal may be found‚ only a few are viable to be used as sources of that metal. Such minerals are known as ores. Examples: Galena‚ PbS‚ etc. It is usually contaminated with earthly or undesired materials known as gangue. The extraction and isolation of metals from ores involve the following major steps: • Concentration of the ore‚ • Isolation of the
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Have you ever heard of the second largest classic explosive eruption of the twentieth century? The purpose of this report is to examine the cataclysmic eruption of Mount Pinatubo in June 1991. This volcano is located on the island of Luzon in the Philippines; a mere 90 kilometers (55 miles) northwest of the capital city of Manila (Rosenbu‚ 2010) (see Figure 1). Specifically‚ this report will give a vivid description and information about the volcano. It will discuss a variety of factors related to
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May/June 2011 Syllabus 5070 Paper 21 A1 Allow correct name but formula takes precedence (a) V2O5 (1) (b) ZnSO4 (1) (c) AgI (1) (d) CF3Cl3 (1) (e) (NH4)2SO4 / ZnSO4 (1) (f) CH4 (1) (g) (NH4)2SO4 (1) [1] [1] [1] [1] [1] [1] [1] [Total: 7] A2 (a) sulfur dioxide (1) Allow SO2 (b) copper(II) sulfate (1) Allow CuSO4 (c) H+ + OH– → H2O (1) Ignore state symbols (d) (i) Copper(II) hydroxide (1) Allow Cu(OH)2 (ii) Cu2+(aq) + 2OH–(aq) → Cu(OH)2(s) Balanced equation (1) Correct state symbols (1) [1]
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of hydrocarbons. Combustion is the process of burning that occurs when fuel‚ oxygen‚ and heat are simultaneously present. The result of complete combustion is the release of energy‚ carbon dioxide‚ and water vapor. If the hydrocarbon contains sulfur‚ sulfur dioxide also will be present. On the flip side‚ incomplete combustion results in some of the carbon atoms combining with only one oxygen atom to form carbon monoxide and other potentially harmful by-products. Usually‚ the combustion process is
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MODULE 2 WORKSHEET 6 CALCULATIONS INVOLVING GASES Syllabus reference 9.3.2 1 Two identical gas flasks‚ A and B‚ are kept at the same temperature and pressure. Flask A contains 10 g of ethane gas‚ C2H6. Flask B contains sulfur dioxide gas‚ SO2. Calculate the mass of sulfur dioxide gas in flask B. moles ethane 10/30 0.33 mol moles SO2 0.33 mol mass SO2 0.33 64 21 g 2 What mass of nitric oxide‚ NO‚ is present in a 2.5 L flask at a pressure of 100 kPa and 0ºC? mole NO 2.5/22.71
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Persuasive Speech Alternative Fuels for Diesel 11/30/06 8:00 AM To persuade listeners to support alternative fuels The strain on the diesel supply in America is too high and a stable source must be found to alleviate the strain. Bio-diesel is a suitable additive in diesel that would help reduce this strain. Bio-diesel is also much safer than conventional petrol-diesel. Topic: Alternative Fuels for Diesel Speaker ’s Goal: To persuade listeners to support alternative
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We breathe it and burn fuels in it. Plants use it to grow. It is all around us but we hardly notice it except when the wind blows. Aircraft and birds fly in it. More than one hundred kilometres above us‚ satellites look down through it. In the apparatus shown here‚ air is passed from one syringe to the other while the copper in the tube is heated. The oxygen from the air joins with the copper‚ so the volume of the air gets smaller. The amount of oxygen in the air is the difference in
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