POLLUTION Pollution is the introduction of contaminants into the natural environment that causes adverse change. Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. Forms of pollution The major forms of pollution are listed below along with the particular contaminant
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SALINITY AND DEEP OCEAN CURRENTS OVERVIEW Ocean currents arise in many different ways. For example‚ wind pushes the water along the surface to form wind-driven currents. Deep ocean currents are caused by differences in water temperature and salinity. In this experiment‚ the students will hypothesize the cause of ocean currents and then develop a model to explain the role of salinity and density in deep ocean currents. CONCEPTS Salt water is more dense than fresh water‚ and is therefore
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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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Vehicular Pollution problems in India There are three broad sources of air pollution from human activities: stationary or point‚ mobile‚ and indoor. In developing countries especially in the rural area‚ indoor air pollution from using open fires for cooking and heating may be a serious problem. Industries‚ power plants etc. are the cause of stationary air pollution. But in urban areas both developing and developed countries‚ it is predominately mobile or vehicular pollution that contributes to
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Light pollution Light pollution‚ also known as photo pollution or luminous pollution‚ is excessive artificial light. This phenomenon is pronounced around urban centers‚ where city lights diminish the view of stars and planets. In addition to brightened skies around cities‚ light pollution also refers to any outdoor light that creates glare and interferes with the natural night environment. Cause Light pollution results from outdoor lights aimed
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Chapter 15 – Restless Realm: Oceans and Coasts Key Point • Why does ocean water circulate? • How does the topography of the ocean floor change from a continental margin to the mid-ocean ridge? How are the oceans mapped? • How do ocean waves and breakers form? • How sediments are moved along a shore line and what coastal features are formed? • Be able to recognize both depositional and erosional coastal landforms Why should we study the oceans? • 70% of Earth’s
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Vehicle Pollution Introduction Urban areas - both developed and developing countries‚ this predominately mobile or vehicular pollution that contributes to air quality problems. All motor vehicles exhaust fumes coming out of the tailpipe when the engine is running mostly through the air pollution issue. Tailpipe emissions of vehicle engines burning fuel‚ the products are emitted from vehicle exhaust system. Vehicular pollution is the worst thing about that as vehicular emissions at ground
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10‚ 2013 The Islamic Republic of Iran is a country rich in history‚ culture‚ and beautiful landscapes. All of these wonderful characteristics are in jeopardy of being destroyed. Not by wars‚ riots‚ or naturals disasters‚ but by air pollution. The volume of pollution in Iran is commonly associated with their domestic fuel production. This production of fuel increased when sanctions were imposed by the United States and European Union several years ago. These sanctions caused a reduction in the amount
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manufacturing‚ pulp‚ paper and paperboard products‚ and textile products‚ correspondingly discharge large amounts of wastewater (PEM‚ 2003). Most of the water pollution-intensive industries are in National Capital Region‚ Calabarzon‚ and Region III. Food manufacturing industries‚ piggeries‚ and slaughterhouses are the main sources of organic pollution (PEM‚ 2004). A report from a study conducted by the United Nations Industrial Development Organization (UNIDO) in 1999 emphasizes that the situation is
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Environmental pollution in Dhaka city INTRODUCTION: Pollution is an undesirable change in the physical‚ chemical or biological characteristics of air‚ water‚ soil or food that can adversely affect the health‚ survival or activities of human or other living organisms. The effects of water pollution are far-reaching and affect not only the environment‚ but human beings and animals as well. The pollution in Dhaka has reached alarming levels‚ threatening public health‚ ecosystems and economic
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