Study

Deep blue sea

  •   0%
  •  0     0     0

      Back   Restart
  • The world's fisheries provide employment for ... people and food for billions.
    37 milion
    3.7 million
  • Around... of the ocean receives protection through marine reserves, no-fishing zones, etc.
    10%
    3%
  • The sea level has risen ... over the past 100 years.
    25-50 cm
    10-25 cm
  • The oceans cover just over... of the planet. They are the Earth's largest life-support systems.
    70%
    30%
  • The largest living structure in the world is the Great Barrier Reef - as coral reef which measures around ... kilometres in length.
    2,600
    500
  • There are many endangered species including whales, dolphins, sharks and turtles. As many as ... are killed each year for their meat.
    10 million
    100 million
  • An estimated ... of all life on Earth is found in the oceans.
    50-80%
    30-50%
  • About ... of the oxygen we breathe is produced by the oceans.
    45%
    70%
    • Your experience on this site will be improved by allowing cookies.