Ask people here in South Korea where the majority of smog, fine dust, or the scientific term PM2.5 comes from, and you'll get quite a few different answers. However, if you ask Greenpeace, you'll only get one. Earlier this year, the NGO released a joint study conducted with Harvard on air pollution in South Korea, and according to those results, blaming China misses the bigger culprit, South Korea's coal power plants, here at home. Korea FM spoke with a representative of Greenpeace here in Seoul to learn more about the research and its implications.