We’ve turned to dumping plastic into our oceans and seas, so much so that plastics dumped in one side of the world are being washed ashore on far-flung beaches on the other side. Our oceans are now so full of plastic, it’s worked its way into the human food chain, and now everybody’s DNA contains plastic. We’ve polluted the waterways with chemicals such that the mercury content of most fish makes them unsafe for human consumption. And as ocean vapours form and release from clouds, the cycle of contamination continues back to land in a continuous loop.