De Rothschild sailed the Plastiki across the Pacific Ocean from San Francisco to Sydney. That's fifteen thousand three hundred and seventy two nautical kilometres. On the way, De Rothschild took the special boat through the 'Great Garbage Patch'. It is a huge area in the Pacifc with 3.5 billion kilogrammes of rubbish. You can see every kind of human rubbish here:shoes, toys, bags, toothrushes, but the worst problem is the plastic. It kills birds and sea life.