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Natural resources and renewable energy.

Extracts from this document...

Introduction

GROUP 6 Names of group Members ID Number Oguttu, Anita Nancy 608862 COURSE: ENV 2000 - ENVIRONMENTAL SCIENCE INSTRUCTOR: Dr. J.H.P KAHINDI QUESTION: Discussion Topic DATE: February 12, 2002 OUTLINE I. Question 1 A. Introduction 1. Definition of Natural Resources and their classifications B. Renewable Natural Resources 1. Food Resources 2. Water Resources and Purification 3. Climate control 4. Natural Pest and Disease Control 5. Solar Energy 6. Air Resources and Purification 7. Soil Formation and Renewal 8. Waste Removal and Detoxification 9. C. Non-Renewable Natural Resources 1. II. Question 2 A. Introduction 1. Interpretation of the Statement in Question B. Renewable Sources or Energy (Heat) 1. C. Non-Renewable Sources of Energy (Heat) 1. III. Question 3 A. Introduction 1. What makes Technology B. Effects of Technology on the Environment 1. Pollution 2. Deforestation 3. Desertification 4. Increase of Greenhouse Gases 5. Loss of Marine Habitat 6. Tourism and Sports IV. References 1. "Natural resources are the building blocks on which modern society depends. Knowledge of their physical nature and origins, and the web they weave between all aspects of human society and the physical earth can lay the foundations for a sustainable society" DISCUSSION Introduction Natural resources are those goods and services provided by the earth's natural processes, supporting all economies and life. Broadly these resources can be categorized as separate subject areas namely geological, water and food resources, some under which topics may emerge. Geological resources can be sorted out in two categories; those of which are renewable and non-renewable. Renewable resources are quickly and easily replaced unlike non-renewable resources, which take a longer time to replenish. There will be various resources that will be sorted under these two types of geological resources. Of importance here though is not which resource is easily obtainable but how they affect the modern society. Answers to the below three questions should be covered in the discussion to follow, mainly focusing on how natural resources benefit modern societies. ...read more.

Middle

One is the danger of supposing that breakfast comes from the grocery, and the other that heat comes from the fireplace" Do you agree? Yes we agree. DISCUSSION Introduction Literally, the above statement is trying to emphasize that sources of natural resources, such as food and energy, are not of much concern as should be. It should be noted that their nurturing is what will sustain their supply. Not much consideration is taken in conserving the environment, which provides us with these resources. It is through environmental conservation that natural resources will not decline in their supply, the consequence being fewer crisis as a result of exhausting resources. It must be understood how food is produced and what needs to be done to support societies with limited food supplies. It is correct to say that a fireplace is indeed a source of heat but care should be taken on which resources are used for heat purposes. If firewood is used exceeding the supply in which it is replenished, their supply will be scarce, worse still the purpose of trees in the environment will not be catered for. This means that other approaches in obtaining energy, as a source of heat should be devised. The following questions derived form the above statement should be covered in the discussion to follow. 1. How is food produced? 2. What are the available sources of obtaining heat? Knowing the quality of an energy source and the quantity needed for performing a task can save energy and therefore money as well. FORMS OF ENERGY AS A SOURCE OF HEAT Renewable Sources of Energy * Geothermal Energy This is energy abstracted from the earth's internal heat. Magma, which is responsible for this heat, rises towards the earth's crust reaching the surface as lava or remains below the earth's crust heating nearby rocks and ground water. Geothermal reservoirs, which are natural collections of hot water, can be drilled if close to the earth's surface to extract steam or hot water that can be used as geothermal energy. ...read more.

Conclusion

Holes formed in the ozone layer allow more rays from the sun to penetrate the earth's troposphere affecting plants and animals. Developing countries use HC refrigerator technology to leapfrog ahead of industrialized countries without having to invest in costly hydrofluorocarbons (HFC's) and hydrochlorofluorocarbons (HCFC's) technologies that will have to be phased out within a few decades because they are potent green house gasesiv. * Loss of Marine Habitat Highly evolved methods of fishing are not only leading to temporary depletion of fish when over fishing is practiced but may also lead to permanent extinction of these species. With the increasing rise in developments in aquaculture important habitats have been cleared to raise fish and shellfish. Habitats such as mangrove forests serve as protection for coastal systems and harbor significant aquatic species. They have also been cleared for urban developments, agricultural land and industrial logging for timber and firewood. Contamination from airborne pollutants falling on coastal waters, industrial sewage discharges and runoff from lands result from methods, which are the result of scientific knowledge. Coastal wetlands are some of the earth's most productive areas yet they are disappearing for coastal development, agriculture and dam construction and diversion of river water for irrigation. Bottom habitats are being degraded and destroyed by dredging operations and trawler boats which drag huge nets weighted down with chains over oceans bottoms to harvest bottom fish and shellfishv. These operations may not have been possible if it were not for the ever- escalating devices; methods and systems are a payoff of technology. * Tourism and Sports As man realizes effective ways of dominating the environment, he may not realize that he is doing more harm than good. In the construction of a tourist site, certain machinery that would have not otherwise existed if not for technology are used for erection purposes. Mountainous areas may be invaded for erection of recreation and tourist sites that may accommodate visitors on skiing slopes. These visitors may also gather to witness sporting activities such as mountain skiing and bungee jumping. ...read more.

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