Almost as far as the eye can see, trash spreads out over Serbia's Potpecko Lake, lapping against the dam that crosses it.<br /><br />Built up over many years against a backdrop of rolling rural hills, the ocean of plastic now threatens to clog up the dam's hydroelectric plant, a local activist says, and Serbian authorities have ordered an immediate clean-up.<br /><br />Activist Sinisa Lakovic estimates the pile of waste covers some 20,000 cubic metres, most of it from landfills upstream along the Lim river.
