Class VIII

A gas which is major gas in trapping heat and prevent it from escaping is
  1. oxygen
  2. ozone
  3. ozone
  4. nitrogen
Sharks are hunted to create delicacy in Chinese cuisine by its
  1. jaws
  2. fins
  3. eyes
  4. tail
Smoke particles and harmful gases released in air produces a
  1. smoke
  2. haze
  3. fog
  4. smog
When forests are cleared on a very large scale by cutting or burning them down it is
  1. forestation
  2. deforestation
  3. plantation
  4. incantation
Marine animals specially fish when live in factory discharged waste water tends to get poisonous for humans and can cause
  1. death
  2. diseases
  3. both a and b
  4. both a and b
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