SO245C_Lesson4.docx - Lesson 4 Ecology January is named...

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Lesson 4: Ecology January is named after the Roman god, Janus. Because he had one eye on the past and the other on the future, Janus was viewed as two-faced. Thus, he was considered the god of time, the deity of beginnings and endings. In discussing the relationship between ecology and technology, we appear to be caught up in a “January” situation. On the one hand, technological advances have provided ways for alleviating pressing ecological and social problems, such as environmental degradation and poverty. On the other hand, human technological ingenuity is the source of environmental degradation–including deterioration of the ozone layer, deforestation, acid rain, resource depletion, and desertification–all of which are associated with global warming and climate change in one way or another. Lesson 4 focuses on how the science of ecology can help us better understand the environmental threats we face and perhaps find remedies to reverse our impact on the natural environment. Learning Objectives Upon completion of Lesson 4, you should be able to: Describe the components of the Earth system. Explain the principal concepts of the science of ecology. Describe Earth’s five major biomes. Discuss and explain an array of particular ecological challenges. Explain and discuss evidence of global warming and climate change. What To Do Next Reading Assignments Click on the Reading Assignments link above to access your textbook reading assignments and lecture notes. Assessment After you have completed the reading assignments for this lesson and feel comfortable with the material presented, go to the Assignments tool on the left navigation panel and complete Assignment 4 . Congratulations! Once you have completed these items, and have received a passing score on the assessment, you are ready to move on to your next lesson! Reading Assignments Text Readings There is no textbook for this course. Additional Readings
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DIRECTIONS: To access ProQuest articles, you MUST first open a Web browser window to the ProQuest Library; otherwise, you will be denied access to the articles when you click the links. Once your browser is open to ProQuest, simply click on the link for the article you need to read. For detailed instructions on how to access ProQuest, click here . For non-ProQuest articles, use the provided Internet link to access the Required Readings material. Required Readings Internet Links The Whys and Hows for the United States and the International Community Accelerated Modern Human-Induced Species Losses: Entering the Sixth Mass Extinction Lecture Notes The Earth System Earth is our name for the third planet from the sun in our solar system. Our planet's elliptical orbit around the sun is located within what cosmologists call the "Goldilocks zone." Venus is too close to the sun to sustain life—"too hot." The orbit of Mars (the "Red Planet") is on the outer fringe of the zone; it appears to have sustained life at some point in the history of the solar system. However, as far as can be determined, conditions for sustaining life on the Red Planet
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