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Introduction

Since ancient times Nature has served Man, being source of his life. For thousands of years people lived in harmony with environment and it seemed to them that natural riches were unlimited. But with the development of civilization man’s interference in nature began to increase. Industrial revolution which has become a great breakthrough in the development of science and technology and greatly increased the quality of people life at the same time has led to environment degradation threatening with complete devastation of our planet.

Task

On the basis of information obtained from the Internet consider and discuss the following issue:

What should mankind do: to continue the development of science and technology improving the living conditions or to stop any development and to save our planet?

Guidelines to the activity

  1. Try to answer the following questions:

  • What is the origin of the term “ecology”?

  • Was there the problem of environmental pollution before human appearance on the planet?

  • What was it caused by?

  • Did the ancient people pollute the environment?

  • What are the main factors of environmental degradation?

  • How the achievements of science and technology influence the modern environment (give several examples of positive and negative influence)?

  • How the achievements of science and technology help to improve the environmental conditions?

  • What is natural resource management?

  • Are there any ways to save our world without decreasing the pace of human development?

  • Discuss and divide the topics of the reports.

  • Prepare reports (written and electronic ones).

  • Present the reports at the conference.

  • Divide into three groups:

    • Supporters of the technological development.

    • Advocates of the environment

    • Independent experts.

    The first two groups should discuss the problem and the task of the third group is to listen to the representatives of both groups and to arrive at a verdict.

    Skills to be evaluate:

    1. Search for information in the Internet

    2. Preparation and presentation of a report (written, electronic, and oral)

    3. Holding a discussion.

    4. Convincing somebody in the truth of one’s words

    5. Team work

    Evaluation:

    All participants of the activity will get definite number of credits.

    Appendix the effect of nickel, chromium, and primary alpha phase on the creep behavior of ti 6242si

    K.E.THIEHSEN, M.E. KASSNER, J. POLLARD, D.R. HIATT, and B.M. BRISTOW

    Elevated temperature creep tests were performed on Ti 6242So deformed to small (<0.002) plastic strains using a highly aligned creep testing apparatus. Specimens were solution annealed at various temperatures below the beta transus (Tß – 6 OC to Tß – 52 OC) which controlled the volume fraction of primary alpha. Decreases in the amount of primary alpha are associated with decreased primary and steady-state creep rates. The effects of trace levels of the elements Ni and Cr on the creep properties of Ti 6242Si were also studied. Relatively small additions of Ni (0.075 to 0.093 wt pct), which appeared to segregate to the bcc beta phase, substantially increased the creep rates of this alloy, while additions of Cr up to 0.278 wp pct had little, if any, effect on the creep rates.

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