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Environmental Issues — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYEnvironmental Issues3 Marks
Question
While explaining environmental issues, teacher makes a remark that 'Global warming is the most serious threat to civilisation now'. Kalpana gets curious about the various aspects of global warming and asks some questions to her teacher.
  1. What is global warming?
  2. What are various causes of global warming?
  3. How can global warming be reduced?
  4. What values are shown by Kalpana?
✓

Answer

  1. The gradual continuous increase in average temperature of surface of the earth, is called global warming.
  2. Various causes of global warming are:
    1. High level of greenhouse gases in the atmosphere.
    2. Rise in atmospheric temperature.
  3. Global warming can be reduced by taking following steps:
  1. Cutting down use of fossil fuels.
  2. Improving energy usage efficiency.
  3. Reducing deforestation.
  1. Planting trees and slowing down the growth of human population.
  2. International initiatives are also being taken to curb the emission of greenhouse gases, mostly CFCS.
  3. Kalpana is inquisitive, attentive and environment friendly.

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