The Trash Vortex

So where is the world’s biggest landfill? And we are talking really big here. In the US? China, maybe? Well it covers an area at least a quarter of a million square miles... nearly three times the size of the UK. Any ideas? OK, well it was a trick question really – it’s actually a slick of human debris in the sea, floating around in the Pacific starting from around 500 miles off the west coast of the US.