The state of our ocean today is a perfect example of tragedy of the commons. We all use and take from the sea, but the majority of it is not "owned" or governed by any one country, much like the air we breathe, having no borders.
More than a month after the Plastiki set sail from San Francisco, the six-person crew has made it to Christmas Island, nearly marking the halfway point of the ship's journey to cross the Pacific Ocean.
CNN is following the Plastiki's expedition across the Pacific Ocean. The catamaran made from plastic set off in mid-March, with the intention of spotlighting the increasing amount of non-biodegradable material on the planet.
I met David de Rothschild at the Google Zeitgeist conference in 2007 where we both spoke during the session about Green Technology. He explained his idea of the Plastiki Expedition and I was immediately captivated. It had exactly the right combination of elements to appeal to my interests: eccentricity, high idealism and a clear determination to bring about positive change.
Twenty years ago when I had the opportunity to dive to 18,000 feet in the Japanese research submersible "Shinkai 6500" in the Sea of Japan. I fantasized about the amazing animals our team might see deep on the ocean floor: rat-tails, deep sea sharks, and octopi.