China on Wednesday accused developed countries, including the US, of doing too little to curb global warming, ahead of a UN summit discussing issues including climate compensation.

The world’s second-largest economy and the biggest emitter of carbon dioxide, China, has repeatedly argued that developed nations should lead on tackling international climate obligations, AFP said.

“Developed countries’ insufficient political will to provide support” is the biggest problem currently facing international climate efforts, said Vice Minister of Ecology and Environment Zhao Yingmin.

An environment ministry report also criticized the US – currently in the process of pulling out of the 2015 Paris Agreement on global warming. “These unilateral behaviors seriously harm the global community’s willingness and trust in tackling climate change together,” the report says.