The ocean has been described by the United Nations as the heart of the planet because of its importance in supporting life; yet it is facing a number of threats, including pollution.
It is estimated that a staggering 250 million metric tons of plastic could end up in oceans in the next decade.
World Oceans Day is observed on 8 June each year to raise awareness about the importance of the ocean so that government and people around the world take action to protect it.
David Osborn is Director of the International Atomic Energy Agency (IAEA) Environment Laboratories in Monaco.
Derrick Mbatha asked him about the role of oceans in supporting life on earth.