SEPA and Inner Mongolia Yitai Coal Corporation Ltd. jointly sponsored the large-scale propaganda activity on "21st century clean sky." The activity is recently started. Through ways of holding experts' forum, arranging the environment envoys and news reporter to visit the low-sulfur good-quality coal producers, large and medium cities are impelled to change the energy structure. The low-sulfur good-quality coal is promoted. This offers a good atmosphere for improving the municipal air quality...