Pollution Introduction Pollution is the introduction of contaminants into an environment that causes instability‚ disorder‚ harm or discomfort to the ecosystem i.e. physical systems or living organisms. Pollution can take the form of chemical substances or energy‚ such as noise‚ heat‚ or light. Pollutants‚ the elements of pollution‚ can be foreign substances or energies‚ or naturally occurring; when naturally occurring‚ they are considered contaminants when they exceed natural levels. Pollution became
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Ozone depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth’sstratosphere (the ozone layer)‚ and a much larger springtime decrease in stratospheric ozone over Earth’s polar regions. The latter phenomenon is referred to as the ozone hole. In addition to these well-known stratospheric phenomena‚ there are also springtime polar tropospheric ozone depletion events. The details
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Sources of Water Pollution in Textile Industries Process waste from sizing Chemical processing: - desizing‚ scouring‚ bleaching‚ mercerising‚ dyeing‚ printing and finishing Waste water from rinsing and washing after each step of processing Miscellaneous waste:- Cooling water‚ Boiler blow down‚ floor and machine washing‚ spills and leaks. Sanitary waste and domestic waste. PRACTICAL APPROACH TOWARDS WATER POLLUTION CONTROL Reduction in the water volume. Reduction in the conc. /amount of chemicals
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DENITRIFICATION OF CONTAMINATED WATER INTRODUCTION:- This is an eco-friendly and economical project. In this we want to show how to reduce the harmful effects of nitrogen which gets mixed with water by natural hazard or else by man-made hazards. With the help of two types of bacteria like thiobascillus and rod shaped bacteria of bacillus species‚ we want to reduce the adverse effects of the dissolved nitrogen in the water bodies. HYPOTHESIS:- Nitrate-rich water containing denitrifying bacteria
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Depletion of Resource Nowadays‚ world population is increasing ‚ this will affect the depletion of our natural resource. Large population increases in the developing world will strain resources and agricultural productivity (Eicher‚2008) .For Instance ‚ as populations grow‚ it may be necessary to convert additional land for agriculture housing development‚ and infrastructure. However‚ we need more products for our daily basic needs or extra needs for the upper class people . When high consumption
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Ozone Depletion Good morning to our lecturer and my fellow friends. Today I want to deliver a speech on title “Ozone Depletion”. Did you know that about 20 kilometres from the earth’s surface there is a thin layer of gas forming just a small fraction of the earth’s atmosphere‚ without which harmful radiation from the sun would destroy all life on this planet? This is the ozone layer‚ which filters out harmful ultraviolet-B rays. Today‚ because of our negligence‚ the ozone layer is depleting.
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Excessive Use of Natural Resources Leads to Depletion In The End. I. Industrial development destroys the environment by left over and residue materials such as: | a. High concentrations of metals; b. Toxic substances and chemically changed minerals; c. Debris and litter; d. Radioactive infected ground at industrial sites. | II. Large-scale soil erosion because surface soil washes away due to influencing water tides and winds streams. | a. Intensive plowing and draining of farm
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Causes of Air Pollution 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
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Materials removed from the Earth are needed to provide humans with food‚ clothing‚ and housing and to continually upgrade the standard of living. Some of the materials needed are renewable resources‚ such as agricultural and forestry products‚ while others are nonrenewable‚ such as minerals. The USGS reported in Materials Flow and Sustainability (1998) that the number of renewable resources is decreasing‚ meanwhile there is an increasing demand for nonrenewable resources. Since 1900 the use of construction
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Water Pollution Part II Amanda Norris Groundwater Pollution pg. 502: Describe : Groundwater is the water we drink. Few countries go to the great expense of locating‚ tracking‚ and testing aquifers. Volatile organic chemicals (VOCs) contaminate 90% of the U.S. aquifers‚ but 2% of samples had unsafe VOC levels. The US found that ⅓of the 26k industrial waste ponds didn’t have liners to prevent toxic liquid wastes from seeping into aquifers. The EPA had completed the cleanup of 297k of the 436k underground
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