The article points out that the transforming is the best choice of improving contaminative status in mainly city zonein Chongqing and brings forward the aim of the transforming.

• 通过对比燃煤锅炉改烧油和用电,指出煤改气是改善重庆市主城区现有污染状况的最好选择,并提出煤改气的目标。