China's most senior climate change official surprised a summit in India when he questioned whether global warming is caused by carbon gas emissions and said Beijing is keeping an "open mind".
Xie Zhenhua was speaking at a summit between the developing world's most powerful countries, India, Brazil, South Africa and China, which is now the largest emitter of carbon dioxide, the gas allegedly responsible for climate change.
Mr Xie later said that although mainstream scientific opinion blames emissions from industrial development for climate change, China is not convinced.
"There are disputes in the scientific community. We have to have an open attitude to the scientific research. There's an alternative view that climate change is caused by cyclical trends in nature itself. We have to keep an open attitude," he said.