By the end of June, China's installed capacity for renewable energy had exceeded 1.1 billion kilowatts.

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

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

Steel, magnesium and its products, and coal are among the major exported commodities.

Steel, magnesium and its products, and coal are among the major exported commodities.

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

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

China is a large consumer of iron ore.