But to cut pollution, China has reduced steel production, leading to the closure of many plants.

China reduced as much air pollution in seven years as the United States did in three decades.

China is a large consumer of iron ore.

Compared with wet quenching, Mi said the new technique has economic and environmental benefits.

The scale of the industrial internet industry has exceeded 1 trillion yuan.

Hydrogen can only be generated by consuming primary energy such as coal, natural gas and renewable energy.

An executive of the company said such a practice has multiple benefits in both economic and environmental terms.

In terms of improvement in rankings, China's Ansteel Group Corp made the highest jump across 183 places to 217.