Water scarcity involves water stress‚ water deficits‚ water shortage and water crisis. The concept of water stress is relatively new. Water stress is the difficulty of obtaining sources of fresh water for use‚ because of depleting resources.Some have presented maps showing the physical existence of water in nature to show nations with lower or higher volumes of water available for use. Others have related water availability to population. A popular approach has been to rank countries according to
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Chennai NATIONAL SCIENCE SEMINAR WATER CRISIS ON THE EARTH PROBLEMS AND REMEDIES Submitted by A. NAVEEN ANTO‚ Sri Jayendra Golden Jubilee School‚ Sankarnagar - 627 357‚ Tirunelveli‚ Tamilnadu. Date : August 27‚ 2008 CONTENT ♦ INTRODUCTION ♦ WHAT DO WE MEAN BY WATER CRISIS? ♦ WHAT CAUSES & TRIGGERS THE WATER CRISIS ♦ IMPACTS OF WATER CRISIS ♦ REMEDIES FOR WATER CRISIS ♦ CONCLUSION WATER CRISIS ON THE EARTH PROBLEMS AND REMEDIES INTRODUCTION Water the elixir of life feeds the planets
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Water Polution definiton: Water pollution is the contamination of water bodies (e.g. lakes‚ rivers‚ oceans‚ aquifers and groundwater). Water pollution occurs whenpollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds. Water pollution affects plants and organisms living in these bodies of water. In almost all cases the effect is damaging not only to individual species and populations‚ but also to
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WATER CYCLE Water Cycle‚ also known as hydrologic cycle‚ is a process that is constantly recycling the Earth ’s supply of water. This is important because humans‚ animals‚ and plants all need water to survive. It is controlled by the sun‚ which produces energy in the form of heat. This heat energy causes the water in the world ’s oceans‚ lakes‚ etc. to warm and evaporate. As the water is heated‚ it changes its phase from liquid to gas. This gas is called water vapor and this process is called
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Save Water Speech 1 Good morning to the excellencies‚ respected teachers and my dear colleagues. I would like to speech on a very important topic “save water” today at this special occasion. As well all know that how the water is important for the continuation of life on the earth. It is the most basic need of everyone (human being‚ animal‚ plant and other microorganisms). Water is the unique source of life‚ without water we cannot imagine the life here. Life on other planets is not possible just
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Water is good for your Health How many of you‚ when go to a restaurant and the waiter/waitress asks do you want something to drink. How many of you would prefer a glass of water out a fridge filled with soda‚ fruit juices‚ or beer? My guess is that probably no all of you prefer to drink water. I would choose water over the other options. I was not used to drinking water‚ but after I heard of the benefits that water has‚ I started to drink more water. For example when I’m thirsty instead of taking
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Water scarcity is the lack of sufficient available water resources to meet the demands of water usage within a region. It currently affects around 2.8 billion people around the world‚ on all continents‚ at least one month out of every year and more than 1.2 billion people lack the access to clean drinking water.[1] Water scarcity can be a result of two mechanisms: physical (absolute) water scarcity and economic water scarcity‚ where physical water scarcity is a result of inadequate natural water
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Water is an odorless‚ colorless‚ tasteless chemical compound that makes up well more than half of the human body. In addition to being prominent in the make-up of the human body‚ it also covers all but approximately 30% of the Earth’s surface‚ and can be found naturally in all three states of matter: liquid‚ solid and gas. Water is a covalent bond known most commonly by its empirical form; H2O. It can also be identified by the Lewis Dot Structural form shown in the figure in the upper right corner
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desalination of water water‚ desalination of‚ process of removing soluble salts from water to render it suitable for drinking‚ irrigation‚ or industrial uses. The principal methods used for desalination include distillation (or evaporation)‚ electrodialysis‚ freezing‚ ion exchange‚ and reverse osmosis. In distillation saltwater is heated in one container to make the water evaporate‚ leaving the salt behind. The desalinated vapor is then condensed to form water in a separate container. Although long
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Water Pollution SCI/275 Artina Houston September 27‚ 2010 Aimee Pellet Water pollution is when a body of water is adversely affected due to the addition of large amounts of materials to the water. (www.imbgnet.net) There are four types of water pollutions and I’m going to describe each one of them. I’m also going to tell you the solutions that I can up with and how I’m going to get the government and people involved to help. It is a lot of things that we don’t know about water pollution
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