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

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

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

China generated 1.25 trillion kilowatt-hours of electricity from renewable energy during the January-June period.

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

As a large coal supply base, Xinjiang aims to achieve coal output of more than 400 million tons by 2025.

They also said the industry will likely experience demand recovery to a certain extent in the coming months.

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