Environmental problems Of all the global environmental problems‚ desertification is‚ perhaps‚ the most threatening for poor rural people. The most accepted definition of desertification states that it is land degradation in arid‚ semiarid‚ and dry sub-humid areas resulting from various factors‚ including climatic variations and human activities. Drylands cover almost 40 percent of the total land surface of the world and are inhabited by approximately 1 billion humans dispersed over more than 100
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there had been global water activity. In order for the sedimentary rocks to form‚ there must be erosion‚ transportation‚ and deposition of sediments by moving water that contained the sediments. After the sediment has been deposited‚ it will slowly convert into stone. In addition‚ fossils have been discovered within the sedimentary rocks. Fossils could not have been preserved in the rocks unless the deposition process was expeditious. The mere existence of fossils in sedimentary rock is evidence that
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Poverty is general scarcity or dearth‚ or the state of one who lacks a certain amount of material possessions or money.[1] Absolute poverty or destitution refers to the deprivation of basic human needs‚ which commonly includes food‚ water‚ sanitation‚ clothing‚ shelter‚ health care and education. Relative poverty is defined contextually as economic inequality in the location or society in which people live.[2][3]After the industrial revolution‚ mass production in factories made production goods increasingly
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fires Definition: This entry lists the most pressing and important environmental problems. The following terms and abbreviations are used throughout the entry: Acidification - the lowering of soil and water pH due to acid precipitation and deposition usually through precipitation; this process disrupts ecosystem nutrient flows and may kill freshwater fish and plants dependent on more neutral or alkaline conditions (see acid rain). Acid rain - characterized as containing harmful levels of
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weather‚particulary rainfall and temperatures. Mass movement : The movement of weathered material down a slope due to the force of gravity. Rivers have energy this means that they can do work.Write down 3 works that rivers do. 1. Erosion 2. Transport 3. Deposition Attrition : Material being carried by a a river becoming rounder and smaller as they constantly collide with each other. Long profile : Of a river runs from its source to the point where it enters the sea‚a lake or joins another and
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The Ultimate Casestudy Guide VERSION 1 (DEC 2009) Casestudies for Geography GCSE 2010 A guide to using the Ultimate Casestudy Guide This guide is designed to help you prepare for your exams by collecting the casestudy information you have learnt during your GCSE and putting it all in one place. This guide does not replace your notes. Part of your revision should be to go back over your notes and add further details to the information in this booklet. This is essential if you would
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Fluvial processes (erosion‚ transportation and deposition) 13 Characteristics of a river at different courses 12 Resultant landform at different courses and conditions 15 How human activities alter river environments 16 How waves generated and types of waves Wave processes (erosion‚ transportation and deposition) 14 Factors controlling the rate and location of wave processes Landforms created by wave erosion 18 Landforms created by wave deposition 17 How human activities
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commentary The boundless carbon cycle Tom J. Battin‚ Sebastiaan Luyssaert‚ Louis A. Kaplan‚ Anthony K. Aufdenkampe‚ Andreas Richter and Lars J. Tranvik The terrestrial biosphere is assumed to take up most of the carbon on land. However‚ it is becoming clear that inland waters process large amounts of organic carbon and must be considered in strategies to mitigate climate change. A tmospheric carbon dioxide concentrations increased from ~280 ppm before the industrial revolution to over 384
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A Report On Impact of Coastal Development to Seagrass Habitat Executive Summary The purpose of the report is to propose a research on the impact of coastal development to seagrass habitat. This project shows the processes and final results from the survey and research on library and internet that we have conducted. From the survey‚ we found that the impact of coastal development to seagrass habitat have become a serious problem that will face by human being. Meanwhile‚ the major problem
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bottom; this is taken from a minimum measurement of 4.27m and a maximum measurement of 39m. Types of erosion involved in this are abrasion/corasion‚ which is Rocks that are carried in the river grind and erode the riverside and bed. Some of the rock at the sides and bed of the channel are washed away. This type of erosion widens the channel through lateral erosion and deepens the channel by vertical erosion. Also Hydraulic action is an affect where water travelling at a high speed may enter the line of
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