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With minimal alternatives for lighting, parents and children from rural areas in developing countries are often caught in the cycle of poverty. In particular, fuel-based lighting (kerosene) is expensive, dangerous and unhealthy while providing poor illumination and contributing to carbon emissions. Lights on tall structures can disorient migrating birds. Estimates by the U.S. Fish and Wildlife Service of the number of birds killed after being attracted to tall towers range from 4 to 5 million per year to an order of magnitude higher.[65] The Fatal Light Awareness Program (FLAP) works with building owners in Toronto, Ontario, Canada and other cities to reduce mortality of birds by turning out lights during migration periods. Noah Formula lives near the airport and frequently notices poor AM radio reception occurring as planes use the approach path which passes over his home. Having just finished the unit on light wave behavior, Noah now understands that the reception problem occurs because of radio wave signals reflecting off the planes and destructively interfering with waves which approach his antenna directly from the station. Noah’s favorite station – WFIZ – broadcasts at 1240 kHz and is located several miles from his home. Determine the five lowest heights above his home for which reflection off of planes will lead to destructive interference of this 1240 kHz signal. (Assume that the reflected waves do not undergo a phase change upon reflection off the plane.) For a comprehensive understanding of light pollution, contemporary discourse must be coupled with an exploration of the origins and emergence of the concept, which in turn requires a broad understanding of the development of urban nighttime lighting. Detailed historical studies into the technological innovations and social implications of artificial nighttime lighting have been published in the past few decades (e.g. Bowers, 1998 Bowers, B. (1998). Lengthening the day: A history of lighting technology. Oxford: Oxford University Press. [Google Scholar]; Ekirch, 2005 Ekirch, R. A. (2005). At day’s close: Night in times past. New York, NY: W. W. Norton & Company Inc. [Google Scholar]; Isenstadt, Maile Petty, & Neumann, 2014 Isenstadt, S., Maile Petty, M., & Neumann, D. (Eds.). (2014). Cities of light: Two centuries of urban illumination. New York, NY: Taylor & Francis. [Google Scholar]; Nye, 1990 Nye, D. E. (1990). Electrifying America: Social meanings of a new technology, 1880–1940. Cambridge: MIT Press. [Google Scholar]; Schivelbusch, 1988 Schivelbusch, W. (1988). Disenchanted night: The industrialization of light in the nineteenth century. (A. Davis, Trans.) London: University of California Press. [Google Scholar]). And, important studies on the social, economic, and legal aspects of nighttime lighting have also been published recently (e.g. Meier, Hasenöhrl, Krause, & Pottharst, 2014 Meier, J., Hasenöhrl, U., Krause, K., & Pottharst, M. (Eds.). (2014). Urban lighting, light pollution and society. New York, NY: Taylor & Francis. [Google Scholar]). The brief discussion below cannot do full justice to the in-depth explorations of nighttime lighting that these scholars have explored, nor to the various cultural and geographical nuances of historical developments in lighting. Rather, I would like to highlight the conditions within which light pollution arose, which puts us in a better position to assess our contemporary definition and ask how the framing of light pollution responds to the core problem discussed above. In particular, Sections 3.1 and 3.2 will highlight the shift away from how to light cities and, somewhat paradoxically, toward a desire for dark or natural nights. Put otherwise, Street lights we are responsible for  We are responsible for maintaining street lights on all adopted highways. An adopted highway is a road, footpath or bridleway that is maintained at public expense, usually by the highway authority. To solve the starlight problem, some creationists have proposed a change in the speed of light; this proposition became known as c-decay. The idea was first systematically advanced by creationist Barry Setterfield in his 1981 book The Velocity of Light and the Age of the Universe. Setterfield claimed that, at the date of creation, light traveled millions of times faster than it does today and has been decaying precipitously ever since (until it stopped at its present value coincidentally with the ability to detect small changes). This idea is fundamentally absurd and since its inception has been universally derided by scientists. The idea was supported into the late eighties by creationists whose claims became more and more bizarre in attempts to prop up their failing model, until it finally collapsed under the weight of the evidence against it. In 1988, the idea was given up by the major creationist organization Institute for Creation Research, which, in an attempt to distance themselves from the scientific debacle that c-decay had become, became vocal critics of it.[5] Section 2 discusses the moral and political significance of framing problems, in relation to the novel environmental problem of excess artificial nighttime lighting in cities. Section 3 then analyzes the concept of light pollution in detail. Here, both the origins of the concept and its current manifestations are presented, in order to provide a more comprehensive understanding of light pollution. Section 4 returns to the question of how light pollution frames concerns and possible responses, and discusses two interrelated questions: the potential limitations of the concept as a normative or prescriptive tool, and the ambiguities and inconsistencies in its practical application that require clarification. Thus, first steps are taken in dissecting the ethical significance of the concept of light pollution and the role it can play in addressing the adverse effects of artificial nighttime lighting. If the light has one of the following faults please call 01443 425001 during the hours of 8:30am – 5:00pm or 01443 425011 during evenings and weekends. The ‘distant starlight problem’ is sometimes used as an argument against biblical creation. People who believe in billions of years often claim that light from the most distant galaxies could not possibly reach earth in only 6,000 years. However, the light-travel–time argument cannot be used to reject the Bible in favour of the big bang, with its billions of years. This is because the big bang model also has a light-travel–time problem. If you are a customer of one of our electric companies, please log in or use quick access to alert us of the lighting problem. We design, install and maintain street lights on most public highways. See our street lighting policy [pdf, 80.71Kb] . In contrast to old-fashioned incandescent light bulbs used in sodium vapor streetlights, LEDs do not possess filaments that burn out, nor do they get very warm. Because of their improved quality and lower cost, LEDs are now gradually replacing conventional streetlights for outdoor lighting in communities around the world. Good news, right? Concerns have also remained regarding the inverse of proliferating nighttime lighting, namely the rapidly declining access to a natural night sky in the developed world. In recent decades attempts to quantify skyglow and its global presence have emerged, however, data is still somewhat sparse. The first attempt to map this phenomenon on a global scale was published by Cinzano et al. (2001 Cinzano, P., Falchi, F., & Elvidge, C. D. (2001). The first world Atlas of the artificial night sky brightness. Monthly Notices of the Royal Astronomical Society, 328, 689–707.10.1046/j.1365-8711.2001.04882.x[Crossref], [Web of Science ®] [Google Scholar]). A more recent study by Gallaway et al. (2010 Gallaway, T., Olsen, R., & Mitchell, D. (2010). The economics of global light pollution. Ecological Economics, 69, 658–665.10.1016/j.ecolecon.2009.10.003[Crossref], [Web of Science ®] [Google Scholar]) built on their findings and concluded that the amount of people living in areas with a ‘polluted night sky’ is extremely high: around 99% in both North America and the European Union.88. Gallaway et al. (2010 Gallaway, T., Olsen, R., & Mitchell, D. (2010). The economics of global light pollution. Ecological Economics, 69, 658–665.10.1016/j.ecolecon.2009.10.003[Crossref], [Web of Science ®] [Google Scholar]) utilize the threshold criteria established by Cinzano et al. (2001 Cinzano, P., Falchi, F., & Elvidge, C. D. (2001). The first world Atlas of the artificial night sky brightness. Monthly Notices of the Royal Astronomical Society, 328, 689–707.10.1046/j.1365-8711.2001.04882.x[Crossref], [Web of Science ®] [Google Scholar]) for considering an area ‘polluted’ by light. These criteria ‘consider the night sky polluted when the artificial brightness of the sky is greater than 10% of the natural sky brightness above 45° of elevation’ (Gallaway et al., 2010 Gallaway, T., Olsen, R., & Mitchell, D. (2010). The economics of global light pollution. Ecological Economics, 69, 658–665.10.1016/j.ecolecon.2009.10.003[Crossref], [Web of Science ®] [Google Scholar], p. 660).View all notes Furthermore, on both continents approximately 70% of the population lives in areas where brightness at night is at least three times natural levels. From a dark rural area, our unaided eyes can normally see up to 3,000 stars; people with strong eyesight can even see close to 7,000 stars. However, in many urban areas today this number is reduced to around 50, or perhaps even less (Mizon, 2012 Mizon, B. (2012). Light pollution: Responses and remedies (2nd ed.). New York, NY: Springer.10.1007/978-1-4614-3822-9[Crossref] [Google Scholar]). Researchers caution that if the current pace of increasing brightness continues, the ‘pristine night sky’ could become ‘extinct’ in the continental United States by 2025 (Fischer, 2011 Fischer, A. (2011). Starry night. Places Journal. Retrieved 22 October, 2014,. from https://placesjournal.org/article/starry-night/[Crossref] [Google Scholar]). Tonus Fortis Stéroïdes Testogen VigRX Maxman eracto Eron Plus Testogen Penigen 500 Steroïden

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