I watched three young teens race their bikes down an alley and hurl their left over snack packs onto the ground as they sped away. Plastic bags, Styrofoam containers, chicken-bone wings, fries, paper napkins, half-used plastic cups with dipping sauce – abandoned. Things like that aren’t hard to clean up despite the negligence of these boys. Our oceans are another matter. 80,000 tonnes of floating plastic has been photographed swirling around the Pacific – making up a mass larger than France, German and Spain. And it likely isn’t only our youth contributing......