The challenge of gutter oil is so rampant that the nationwide security apparatus began a campaign in 2011 to stamp out the "4 black pests" (打四黑除四害) — black workshops, black factories, black marketplaces and black gambling dens. What at first commenced as an investigation into employing recycled food items oil https://nicenewsdaily.blogspot.ba/search/label/url-HHsGyDomCQKwyFArt3CDokfJX