How can take assistance from the oceans to make the world more sustainable?

Oceans are massive, so is the value they hold, in the form of food sources, minerals, metals, biodiversity and more. They also hold many times the CO2 than does our atmosphere! For all these reasons and more, the ocean is one of the most powerful natural resources. What are the smartest ways by which we can use our oceans for much higher sustainability of the planet?

Tackling the challenge - Sub Topics

Given below are some of the themes and topics about which you can research to know more
about the various avenues available to solve the challenge