GAS WELDING Gas welding is a process that use fuel gases and oxygen to weld and cut metals. Uses: 1-welding and cutting metals 2-in Stone Work for flaming 3-in the glass industry for fire polishing 4-in jewelry production How we use it : The apparatus used in gas welding consists basically of an oxygen source and a fuel gas source it’s pumped through hoses and get out to cut or weld the used metal and there are two cylinders one of them contain oxygen and we can control
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What is land pollution? Land pollution is the deterioration (destruction) of the earth’s land surfaces‚ often directly or indirectly as a result of man’s activities and their misuse of land resources. It occurs when waste is not disposed off properly‚ or can occur when humans throw chemicals unto the soil in the form of pesticides‚ insecticides and fertilizers during agricultural practices. Exploitation of minerals (mining activities) has also contributed to the destruction of the earth’s surface
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What is Land Pollution? When we talk about air or water pollution‚ the reactions garnered are stronger. This is because we can see the effects caused by the pollutants and their extent very clearly. It is normal human psychology to believe in what you see first hand. Our land on the other hand is living a nightmare too. We may not be able to see the effects with clarity‚ but land is being polluted and abused constantly and we are unable to calculate the damages incurred. Land Pollution has come to
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H A B I T A T INTL. Vol. 19‚ No. 3‚ pp. 279-292‚ 1995 Pergamon Elsevier Science Ltd Printed in Great Britain 0197-3975/95 $9.50 + 0.00 0197-3975(94)00071-9 Sustainable Development and the Construction Industry* ROBIN SPENCE and HELEN MULLIGANt Cambridge University‚ UK and tCambridge Architectural Research Limited‚ UK ABSTRACT The construction industry‚ together with the materials industries which support it‚ is one of the major global exploiters of natural resources‚ both physical
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ENERGY RESOURCES Energy is defined as ‘the capacity to do work’. Sun is the primary source of energy. Joule is the standard unit of energy in SI units. Energy utilization is an index of economic development‚ which does not take into account of ill effects/damage on to environment. From 1900 to 2000 population increased by 3 times while energy consumption by 14 times! Energy Resources All energy sources ultimately come from the sun‚ the moon or the earth. Sources of Energy Solar
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Community Issue: Pollution Do you hate seeing rubbish in the street? My topic is all about pollution. Pollution is a problem in Hawaii because it cause health problems‚ water gets polluted by throwing of chemicals in river and other bodies of water and land gets polluted because of too much wastes from industry. My first reason is because it can cause health problems. According to National Geographic‚ lung inflammation can develop when people are exposed to ongoing particulate air pollution some diseases
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Summaries of Newspaper Articles Article: 1 Action against Noise Pollution Overdue Shihab Ahmed The Financial Express Monday‚ January 18‚ 2010 The article reports that there is a draft for noise pollution control law that the government has not yet paid enough importance to in spite of its urgency. The law proposes a fine of Taka 10‚000 and a maximum imprisonment of six months for producing noise higher than the permissible limits. The Society for Assistance of Hearing Impaired Children
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country indicate their pitch in decibel in the nosiest areas of corresponding cities‚ e.g. Delhi- 80 db‚ Kolkata - 87‚Bombay-85‚ Chennai-89 db etc. 3 Sources of Noise Pollution:- Noise pollution like other pollutants is also a by- product of industrialization‚ urbanizations and modern civilization. Broadly speaking ‚ the noise pollution has two sources‚ i.e. industrial and non- industrial. The industrial source includes the noise from various industries and big machines working at a very high speed
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Environmental pollution In this topic we are going to deal about different types of pollution and due to these types of pollution how our environment is facing disasters and calamities. Introduction: Environmental pollution can be defined as “the unfavorable alteration of our surroundings” Types of pollutants: 1. Bio degradable pollutants - decompose rapidly by natural processes. 2. Non-degradable pollutants-do not decompose or slowly decompose in the environment. Pollutions are different
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Environmental pollution The nature is the most wonderful thing in the world. It gives us its loveliness to enjoy and to admire. The nature provides us with its riches: water and air‚ soil‚ mineral resources‚ flora and fauna‚ forests and fields. Nowadays situation is very bad‚ but just someone understand it. It means that many species of flora and fauna have already disappeared or are disappearing because of harmful actions of people. People have always polluted their surroundings. But until
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