Mongolian herder Purev Batmunkh sighs as he picks through waste strewn across a field -- the refuse of an unsightly and deadly waste pollution problem affecting swathes of the steppe. Illegal dumping is common and some of it then blows into pastoral lands, where it is eaten by livestock, like in the case of one of Batmunkh's cattle. "We gutted the cow and we found that all the way from its neck to its intestines and bladder, there was a plastic raincoat inside it," he says. Mongolia is among the world's top per capita producers of plastic waste, and without a centralised recycling programme, campaigners say some 90 percent of it ends up in landfills. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES