BEIJING, May 7 (Xinhua) -- China is pushing its steel enterprises to meet the national ultra-low-emission requirements in their production to promote green growth.

About 60 percent of the domestic steel capacity and over 80 percent are expected to complete the green transition by the end of 2020 and 2025 respectively, according to a guideline jointly released by the Ministry of Ecology and Environment and four other ministries.

The steel sector is considered to be China's biggest polluter in the industrial field as the production and transportation of steel produce many pollutants.

Enterprises which fulfill the target will enjoy more taxation and other policy support, the guideline said.

Emission of sulfur dioxide, nitrogen oxides and particles might be reduced by 61 percent, 59 percent and 81 percent respectively by the end of 2025 thanks to the green effort.