Light Pollution 1. Every urbanite knows the bright lights of the city make it impossible to see the stars in a night sky. What most of us do not know is that those lights also may be making us sick. The cause is light pollution – the unearthly glow of billions of street lamps‚ security and porch lights‚ searchlights‚ office lights and signs – as people everywhere try to dispel the darkness of the night. 2. For the first time‚ light is being investigated seriously as a pollutant and a health hazard
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Air pollution is something that affects us every day whether we know it or not. The definition of air pollution occurs when the air contains gases‚ dust‚ fumes or odor in harmful amounts. That is‚ amounts which could be harmful to the health or comfort of humans and animals or which could cause damage to plants and materials. However; air pollution is something that can be prevented and is there are things that we as humans can do to better the environment. The human impact of air pollution is
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Main effects of sound pollution • Deafness‚ temporary or permanent‚ is one of the most prevalent effects of noise pollution. Mechanics‚ locomotive drivers‚ telephone operators etc all have their hearing impairment. • The first and foremost effect of noise is a decrease in the efficiency in working. Research has proved the fact that human efficiency increases with noise reduction. • Too much of noise disturbs the rhythms of working‚ thereby affecting the concentration required for doing a
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Plastic Pollution Introduction The world population is living‚ working‚ vacationing‚ increasingly conglomerating along the coasts‚ and standing on the front row of the greatest‚ most unprecedented‚ plastic waste tide ever faced. Washed out on our coasts in obvious and clearly visible form‚ the plastic pollution spectacle blatantly unveiling on our beaches is only the prelude of the greater story that unfolded further away in the the world’s oceans‚ yet mostly originating from where we stand: the
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Noise Pollution When unwanted sound created by human beings hits our ears and disturbs the environment‚ noise pollution is created. Chiefly‚ noise pollution comes from barking dogs‚ loud music‚ vehicles‚ aircraft and rail transport‚ air-conditioners‚ factories‚ amplified music and construction work.Noise‚ by definition‚ is unwanted sound. What is pleasant to some ears may be extremely unpleasant to others‚ depending on a number of factors. The natural environment contains many sources of noise -
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The causes of water pollution Water pollution comes from a myriad of sources‚ both natural and from human activity. The most destructive causes of water pollution are man made‚ however. The largest sources include: The burning of coal in power plants emits ash particulates that contain toxic metals like arsenic and lead. Coal and petroleum also contain sulfur compounds. Combustion generates sulfur dioxide‚ a toxic gas‚ and oxides of nitrogen. When emitted from exhaust stacks‚ these two compounds
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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 recognized as a threat to human health as well as to the Earth’s
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races‚ and backgrounds. Racism doesn’t only affect the people but also the environment. Environmental racism is an extreme situation which affect people all over the world because a multitude of innocents are dying. Many people are being affected‚ but whom exactly? Blacks & Hispanic populations‚ poor people are mostly mistreated in society‚ especially with environmental racism. Health and environmental risks cast upon blacks‚ and Hispanics in the communities in which they live.it is stated
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Light pollution happened slowly at first which was several decades ago it was a process that was hardly noticeable. A light here‚ a light there‚ burning way into the dark nighttime realm‚ helping us see in the darkness when people all their our beds fast asleep. The process still continues today‚ with little thought ever given to what we are stealing away. Our intentions are good but our methods need adjustment‚ and they needs to be done immediately. In fact‚ our methods should have been changed
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SPREADSHEET MODELING AND SIMULATION Spring 2014 Instructor: Yanjun Li‚ office: KRAN 422‚ phone: 494-4525‚ e-mail: li14@purdue.edu Office Hours: Tuesday 1:00 – 4:00 pm‚ or by appointment. Course Packet: The course packet contains cases and readings from various sources. Textbook: David Hartvigsen‚ SimQuick: Process Simulation with Excel‚ 2nd Edition‚ Prentice Hall‚ 2004. (ISBN: 0-13-107880-1) References: Law‚ A. M. and W. D. Kelton‚ Simulation Modeling and Analysis
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