What is America's largest export, most prodigious product and greatest legacy? It's our trash. Each of us in on track to toss 102 tons of garbage in the course of our lifetime. Our disposable plastic alone outweighs the entire U.S;. Navy. But we don't like to think about our trash. We send it on trains, trucks or barges to landfills  hundreds of miles from where the garbage was created. We don't have to see it, but in so many ways the disposable, non-biodegradable items that fill our trash are coming back to haunt us, in forms like the Great Pacific Garbage patch of plastic that threatens marine life and ultimately our own.