Each year, nearly 2 billion tons of new bulk industrial solid waste are stockpiled, causing ecological damage and occupying large areas of natural resources, including farmland, forests, and grasslands, it added.

The vice-minister pledged to actively explore new channels for the large-scale disposal and utilization of industrial solid waste while advancing the remediation of historically stockpiled sites.

He stated that the ministry has revised its pollution control standard for the storage and landfilling of nonhazardous industrial solid waste, permitting compliant waste to be used for wall rock filling and for backfilling operations such as the remediation of subsidence areas and pits.

The ministry will continue to guide relevant provinces in conducting pilot projects to use bulk industrial solid waste for the restoration and backfilling of open-pit mines and other sites, Li stated.

He disclosed that large-scale utilization projects have been carried out in the Yellow and Yangtze river basins in 2024.

In nine provincial regions along the Yellow River, 128 projects involving the filling, backfilling, and ecological restoration using coal gangue and coal ash were implemented, achieving a utilization volume of over 100 million tons, he said.

The projects in five provincial regions in the middle and upper reaches of the Yangtze target phosphogypsum, a byproduct of processing phosphate rock into phosphoric acid for fertilizers, he noted. More than 29 million tons of the waste were utilized in 24 projects.

Li revealed that the ministry has so far completed the remediation of safety hazards at over 5,000 tailings ponds, with more than 2,200 of these located in the Yangtze River Economic Belt and the Yellow River Basin.

The ministry will ramp up efforts to investigate and mitigate environmental safety hazards at heavy-metal mines, tailings ponds, waste yards, and hazardous-waste landfills, he noted. For sites that meet environmental standards, it will proactively move to close and cap them, followed by high-standard ecological restoration.

According to the action plan from the State Council, the country aims to remediate at least 60 percent of historically stockpiled solid waste sites by 2030.

While vowing to beef up comprehensive utilization of solid waste, Wang Peng, director-general of the department of energy conservation and comprehensive utilization of the Ministry of Industry and Information Technology, also stressed source reduction as one of his ministry's priorities in its efforts to implement the action plan.

"We will integrate green design at the initial stage of production and implement green manufacturing throughout the entire process to minimize industrial solid waste at the source and improve the overall environmental performance of industrial products," he said.

Focusing on key waste-generating industries such as steel, non-ferrous metals, petrochemicals, and chemicals, the ministry will guide industrial parks and enterprises to implement "zero-waste" transformations to reduce the intensity of solid waste generation and ease its utilization.

houliqiang@chinadaily.com.cn