(D30)2 / [D10 x D60] = 0.1252 / [0.55 x 0.078] = 0.36422 < 1 Cu = D60 / D10 = 0.55 / 0.078 =7.0513 > 6 If a soil is well-graded‚ it should satisfy 1 < Cc < 3 Cu > 4 (for gravels) Cu > 6 (for sand) Note that‚ from our result‚ Cc is much smaller than one. So by the constraints 1 < Cc < 3‚ we can conclude that the testing soil is not well-graded‚ but poorly graded. And the Cu obtained is 7.0513 > 6‚ which implies that the sample should be sand but not
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Air Pollution * Pollutants enter the air from various sources‚ but burning of fossil fuels contributes the most to air pollution. * Exhaust fumes from vehicles contains soot (tiny carbon particles)‚ lead (from cars using unleaded petrol)‚ carbon monoxide‚ oxides of nitrogen and hydrocarbons due to the incomplete combustion of fossil fuels. * Burning of fossil fuels in the combustion engines of vehicles and electrical power stations also releases large amount of carbon dioxide into the
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Its economy is mainly oil driven . Background Pollution is the introduction of contaminants into the environment . Those contaminants bring about instability ‚ dis ‚ harm or discomfort to the physical systems or living organisms there in . Pollution can take the form of chemical substances or energy such as noise ‚ heat or energy . Just like many industrialized countries ‚ Bahrain faces environmental challenges resulting from pollution . This tries examines those challenges and related
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Air pollution is the introduction of chemicals‚ particulates‚ biological materials‚ or other harmful materials into the Earth’s atmosphere‚ possibly causing disease‚ death to humans‚ damage to other living organisms such as food crops‚ or the natural or built environment. The atmosphere is a complex natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earth’s
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Plastic Pollution in Hawai’i Plastic plays a big part of our lives. The food we eat is wrapped with it‚ the toys our siblings or children play with is made from it‚ the television we watch is made with it‚ we play video games with plastic controllers‚ we listen to music with plastic head phones and the shelves we use is made with plastic. Material items made with plastic can be useful‚ cheaper‚ and durable but it can also harm the environment. All of these plastic items don’t just disappear
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Introduction Two Environmental Problems in Ethiopia would be soil degradation and overpopulation. This presentation will cover the main questions of why this is happening and answers that could help and control Ethiopia ’s land and overpopulation problems. Strategies will be assessed as to the help Ethiopia needs from inside and outside sources. Other regions in the world will be identified that have progressed from these same problems‚ and what impacts these implementations have had on their success
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Pollution - Environmental pollution is any discharge of material or energy into water‚ land‚ or air that causes or may cause acute (short-term) or chronic (long-term) detriment to the Earth ’s ecological balance or that lowers the quality of life. Pollutants may cause primary damage‚ with direct identifiable impact on the environment‚ or secondary damage in the form of minor perturbations in the delicate balance of the biological food web that are detectable only over long time periods. Until relatively
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The most important problem faced by the modern world today is environmental pollution. Unless and until effective measures are adopted to prevent this grave problem‚ it is going to affect life on earth. Man has exploited the natural resources in order to meet the demands of the ever-increasing population and also to meet the requirements of industries. As the demand for basic things like food‚ water‚ clothes and shelter increased; man exploited natural resources like minerals‚ forests‚ water and
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Air pollution Air pollution is a problem everywhere in the world. Local air pollution usually affects big cities. Air pollution becomes a worldwide problem when local pollution moves away from where it came from. For example‚ winds carry air pollution made in the middle of the western part of the United States to Canada‚ like acid precipitation. Acid precipitation Acid precipitation is precipitation‚ like rain‚ sleet‚ or snow‚ that contains acids from air pollution. When fossil fuels are burned
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Air Pollution Air pollution is very bad. We should regulate the excretion of air pollution from combustion engines and factories. Air pollution is contaminated air. It is both a health hazard and an environmental hazard. There are several ways how air pollution is bad‚ but there are also ways to help decontaminate or at least lower some of the pollution. Many people know about air pollution‚ but not everyone knows how hazardous it really is. According to the Environmental Protection Agency
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