Other possible benefits include a possible (but conjectural) decrease in chronic respiratory disease, reductions in damage to forests, improved visibility, and incidental reductions in carcinogenic emissions.

• 其他可能的利益包括（据推测）慢性呼吸道疾病的减少，对森林破坏的降低，可见度的提高，以及致癌物排放的减少。