石炭は二酸化炭素の発生量が多い化石燃料のため、環境に配慮して有害物質を取り除き効率的に使うことで石炭汚染の緩和に取り組む。←この活動をクリーンコール活動というみたいです(長い

Coal is a fossil fuel that produces a lot of carbon dioxide, so for the sake of environmental pollution, we're working to remove toxic outputs and using it in an efficient and environmentally friendly manner. ← This sort of activity is called "clean coal" (that was long-winded)