Mankind is Causing Global Warming Essay Example | Topics and Well Written Essays - 750 words

Mankind is Causing Global Warming - Essay Example . In fact, 25% to 30% of the greenhouse gas that is released into the atmosphere every year is 1.6 billion tonnes which is due to deforestation. According to Daniel Howden, (2007) "In the next 24 hours, deforestation will release as much CO2 into the atmosphere as 8 million people flying from London to New York. Stopping the loggers is the fastest and cheapest solution to climate change. So why are global leaders turning a blind eye to this crisis" The rapid destruction of the rainforests which forms a valuable cooling band in the region of the Earth's equator is one of the main causes of climate change. Carbon expelling due to deforestation far surpass damage induced by planes and automobiles and factories. Water vapour is the most widespread and most potent greenhouse gas on the planet. It increases as a result of warming induced by carbon dioxide, methane and other greenhouse gases. "Because the air is warmer, the relative humidity can be higher (in essence, the air is able to 'hold' more water when its warmer), leading to more water vapor in the atmosphere" (http://lwf.ncdc.noaa.gov/oa/climate/gases.html, accessed on 29th April, 2009). Water vapour holds on around 2/3rd of the heat pinned by all the greenhouse gases (L.R.Kump, 2002) due to which global climate change has occurred. Meth Methane, a natural gas is the 2nd most vital of the greenhouse gases ensuing from human actions. It is formed by rice cultivation, cattle and sheep farming, and by decomposing material in lowlands. Methane is also let out during coal removal and oil drilling, and by permeable gas pipelines. Human actions have enhanced the density of methane in the atmosphere to around 145% above to the quantity that is present naturally. (http://www.gcrio.org/ipcc/qa/04.html,1997, retrieved on 29th April 2009) Carbon dioxide emitted by vehicles is also a reason for global warming. According to the US Emissions Inventory 2006 page 8 vehicles which have poor gas mileage add the most to global warming. For instance, according to the E.P.A's 2000 Fuel Economy Guide, a new Dodge Durango sports utility vehicle which gives 12 miles per gallon in the city will emit an approximate 800 pounds of carbon dioxide above a distance of 500 city miles. But if a large vehicle is used like the SUV's then due to their narrow wheel base they are 4 times as liable as cars to overturn in an accident (Keith Bradsher, Article appearing in the San Francisco Chronicle, December 12, 1997 originating in the New York Times). Another principal man-made ground of Global Warming is population. More people lead to more food, and more modes of transportation. This only means more 3 Methane as there will be increased amount of burning of fossil fuels, and more agriculture. The main source of methane is manure. Because more food is demanded more food has to be raised. Animals like cows are a resource of food which leads to increase in manure and methane. Yet another issue with increasing population is transportation. Increased number of people means more cars, and more cars means more pollution. (http://library. thinkquest.org/J003411/causes.htm, retrieved on 29th April 2009). The permafrost sheet has begun to melt due to human activities. Alaskan permafrost has apparently warmed up by a mean of 1.5C over the past 15 years. (Osterkamp, 2000,

Inventory management and materials requirement planning Assignment

Inventory management and materials requirement planning - Assignment Example Introduction Inventory management can be defined as the practice of managing the inventory of an organisation so as to ensure that it does not go out of stock and that the needs of the organisation are continually met (Pillsbury, 2005). Inventory management is carried out in order to protect the organisation against stock-outs when there is variability in terms of demand. Inventory management and materials planning in a military setting is very much different from the business setting due to the nature and sensitivity of the inventory itself. The fact that there is always need to provide the right materials to the military personnel at the right time especially during war has resulted in a situation where the inventory management practices adopted are very risk averse leading to the holding of a lot of inventory at a time in their stores. This is due to the fact that there is need to consider the risk of lacking particular materials when they are needed by the personnel on the ground (Hillier and Lieberman, 2001). Royal Air force of Oman Inventory system The Royal Air force of Oman is no exception to the inventory management practices adopted by the military. ... Some of the items in the inventory have been there for many years and the military is now being faced with the risk of obsoleteness as new technology development has resulted in new more advanced military equipments (Max, 2005). Military organisations all over the world have traditionally focused on keeping high levels of inventory in order to be able to deliver the needed services and equipments to their personnel. This has therefore led to a situation where the military organisations have to take a risk averse position and adopt inventory management practices which allow the storage of high levels of inventory for readiness purposes. This is a practice that most military logistics personnel adopt and has resulted in a common believe that holding more inventory is better when it comes to being ready for warfare and being ahead of other military forces. It is however important that these military organisations adopt better inventory management practices so as to reduce the costs of s torage and the risk of obsoleteness. This will help them manage their inventory levels in a more cost effective manner thus lowering some of the heavy costs they have been incurring over time (Melcher and Ferrari, 2004). Inventory Management Systems There are several inventory management systems that can be used by an organisation to manage their inventory. These are; reorder point systems, periodic review systems and material requirements planning. The inventory management system adopted by military organisations such as the Royal Air force of Oman is based on the material requirements planning system. This is due to the fact that most of the materials purchased by the military are based on needs and therefore