Hong Kong Race Week celebrates #WorldOceansDay. A day to reflect on the extremely important role the oceans play in all our lives, the dangers facing our oceans and the actions needed to protect them. 71% per cent of our planet is covered by one huge, continuous body of seawater – the ocean. It holds 1.35 billion cubic kilometers of water. The ocean controls the climate, provides heat in winter and cool air in summer. It also provides us with food, medicines and transport.