The central ecological and environmental protection inspection campaign has played a key role in addressing some critical and deeply-rooted environmental problems in China, Zhai Qing, vice-minister of the Ministry of Ecology and Environment, said on Oct 21.

The campaign, promoted and spearheaded by the central leadership, was piloted in late 2015 and has since been carried out across 31 provincial-level regions in China, as well as some government departments and State-owned enterprises, he said on the sidelines of the 20th National Congress of the Communist Party of China.