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Question 1. Carbon dioxide is called greenhouse gas because it is
  1.    Transparent to sunlight but traps heat
  2.    Transparent to heat but traps sunlight
  3.    Used in green-house to increase plant growth
  4.    Transparent to both sunlight and heat
Answer: Option A

Question 2. Which of the following enhances soil fertility?
  1.    Crop rotation
  2.    Improved methods of agriculture
  3.    Using new seed varieties
  4.    Irrigation
Answer: Option A

Question 3. Coral reefs in India can be seen in
  1.    Himalayan region
  2.    Andaman and Nicobar Islands
  3.    Uttarpradesh
  4.    Maharashtra
Answer: Option B

Question 4. What is the most important factor for the success of animal population?
  1.    Natality
  2.    Adaptability
  3.    Unlimited food
  4.    Inter species activity
Answer: Option B

Question 5. What is the official name of IUCN?
  1.    World Wide Fund for Nature
  2.    International Union for Conservation of Nature and Natural Resources
  3.    United Nations Environment Programme
  4.    United Nations Educational, Scientific and Cultural Organization
Answer: Option B

Question 6. What is UNCED?
  1.    United Nations Conference on Education,
  2.    United Nations Conference on Environmental Day
  3.    United Nations Conference on Environment and Development
  4.    None of these
Answer: Option C