International business Essay Example | Topics and Well Written Essays - 1250 words

International business - Essay Example Combustible energy sources like coal, oil and wood emit environmental pollutants and contaminants. Only those sources that offer minimal contamination to the environment are deemed acceptable if they are to be sustainable. The sun is the cleanest source of energy with its free-of-charge irradiation and easy access all over the world. The sun’s irradiation can be converted to usable energy via hybrid conversion, simultaneously, into electrical and thermal energy (Afgan, 2008: p240). This involves the use of hybrid collectors that differ from thermal collectors due to the construction of their absorber, with solar cells, water flow tubes, and a metal system. The collectors can be used in hospitals, private companies and small industries. Compared to ordinary solar panels, the hybrid collector ensures better usage of space, savings during construction and the simultaneous conversion of solar energy into electric and thermal, current using one device. They are contemporary and eco logically clean. Sustainable development can be defined as the as the integral cultural, social, technological, and economic development that is adjusted to the requirements of environmental protection, thus enabling present and future generations to satisfy their needs and improve their quality of life (Afgan, 2008: p242). The underlying principle of sustainable development is the creation of an effectual system of distribution and application of resources over the long-term. Sustainable development focuses on the rational use of the earth’s natural treasures, with the concept oriented towards life upgrading and improvement of environmental quality. In order to accomplish sustainable development, there is a need to provide sustainable energy. This means that future development needs to be based on the lowering and strict control of environmental emissions and the use of renewable and clean energy (Afgan, 2008: p243). The cleanest source of energy that can aid in the achievem ent of this goal is solar energy. For five billion years, the sun has been sustaining and enabling life on earth. The sun’s rays have provided energy for growth, as well as development, of plants via the process of photosynthesis. Now, it is time for the sun to power our industries and drive development around the world as a sustainable energy source. Key Words; Solar energy, solar collectors, sustainable development 1. SUSTAINABILITY Solar energy is one of the main sources of clean and sustainable fuels. The main source of power or the fuel is suns rays that falls on the earth. Solar collector that is used to generate power using suns rays is essentially a sustainable system. The main reason as to why this is called sustainable is that the energy source continues to provide limitless energy. Unlike finite sources of power such as oil or coal, there is no depletion of power. While creating energy, carbon is mot emitted in significant quantity. It is true that some amount of c arbon is released and conventional power consumed while making the solar panels and solar cells and while manufacturing components such as solar collectors, inverters, batteries, electrical lines and cables and other such components. However, these are one-time costs only. The process of power generation and consumption remains sustainable and perennial. It meets the definition of sustainability where the needs of the present are met and the needs of the future generations are not compromised. There is almost zero impact on the environment due

Machines in Modern World Essay Example | Topics and Well Written Essays - 2250 words

Machines in Modern World - Essay Example Planting the seed is done manually and as the time for reaping comes you spend hours in the fields reaping the corn or wheat with a scythe. It is slow, frustrating and backbreaking work. Of course, the scenario given above did exist some time in the distant past. Maybe one has even read about it or seen such a life in some movie. But after experiencing all the conveniences of the machine filled it is difficult to imagine going back to a world without machines. This article is about machines and how they have enriched our lives both at the workplace and at home. It was also look at some of the disadvantages also. It will also take into account all the advantages and some disadvantages of using machines and in the end will show that after taking into account all the pros and the cons, the world is a better place to live in because of the abundance of machines that we see and use everyday. Man the machine: In effect the human body or the body of any creature that can move can be called a machine. The body is used to carry loads and perform tasks with hands and feet just like machines. Even animals use their body as machines. In fact, no machine quite as complex as the human body has ever been built. The human body has the circulatory system, the nervous system, the reproductive system, the skeletal system, the muscular system and the excretory system and no machine has even come close in complexity. If the body is such an efficient machine it could be asked as to why machines have been built. The answer would be that the body has its limitations. It cannot work continuously as machines can, it cannot carry the heavy loads that machines carry and it cannot repeatedly carry out error free operations as a machine can. But what it can do is, think creatively, and constantly look for ways to make life more convenient. This is the main difference between the human being whe n compared to other creatures.. With their limited thinking capacity, very few animals creatively use tools for more efficiency. The ant still carries its food on its back instead of using a trolley and tigers and lions still hunt using their feet and claws to kill instead of using a gun. But human beings have over the long period of its existence thought of and invented a wide array of machines that can perform tasks far more efficiently and quickly and will continue to do so. So machines are essentially a thing that is intended to make life more efficient and in some cases dangerous for us. To make the matter more clear a detailed look at the limitations of the human body and the advantages machines have over it would be appropriate. Limitations of the human body as a machine: a. Fatigue: No living organism can live or do work without getting energy. Energy is obtained from nutrients that are found in the food that is eaten by a person. A body needs adequate nutrients like fat, proteins, minerals, carbohydrates and water to perform tasks and to survive. A depletion of these nutrients will result in fatigue which in turn will affect his performance. A person can work without food relying on his internal reserves of energy for a few days. Some who are healthier can extend this period for a few more days. But ultimately there is a limit to what the body can take and there will come a time when it will refuse to function the way we want. Of course, energy is needed for machines to work too. But that will be discussed later in the article. b. Thirst: Thirst is taken up for special mention because the human body can