Japan and South Korea, where no kosa is produced, are concerned with kosa as well because the factories of companies in these nations generate air pollutants that stick to kosa and because they import wood, agricultural products and livestock products that may cause desertification, and therefore, they are also responsible.
発生地ではない日韓も、黄砂に付着する大気汚染物質の発生源である自国企業関連の工場や、砂漠化につながる木材・農産品・畜産品の輸入などを通しても関わっており責任がある。