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Natural Resources — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceNatural Resources1 Mark
Question

Greenhouse effect is caused by:

  1. Green plants.
  2. Infrared rays.
  3. UV-rays.
  4. X-rays.
✓

Answer

  1. Infrared rays.

Explanation:

Greenhouse effect is caused by infrared rays. Gases like carbon dioxide absorb infrared rays, thereby increasing the temperature of earth and hence causing greenhouse effect.

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