"The Chinese have made, on the political level, a conscious decision to capture this market and to develop this market aggressively," said Donald Pols, an economist with the WWF.
Denmark earns the biggest share of its national revenue from producing windmills and other clean technologies. As a longtime leader in wind energy, Dwnmark derives 3.1% of its gross domestic product (GDP) from renewable energy technology and energy efficiency.
The United States is rapidly expanding its clean-tech sector but China is 'on another level'.
China is the largest producer in money terms, earning more than €44 billion - 1.4% of its GDP.
"When you speak to the Chinese, climate change is not an ideological issue. It's just a fact of life. While we debate climate change and the transition to a low carbon economy, the debate is passed in China," Pols said. "For them it's implementation. It's a growth sector, and they want to capture this sector."
"Clean technologies are really growing fast, but China is responsible for the majority of that growth," said Ward van den Berg