China is responding to climate change on many fronts and its efforts in developing green energy are noteworthy, according to delegates attending the UN climate change conference Wednesday.

Renata Lok-Dessallien, UN Resident Coordinator and United Nations Development Program (UNDP) Resident Representative in China, spoke highly of China's efforts to combat climate change, especially its achievements in developing renewable energy.

"China has worked in this field for many years. In 2006, it promulgated the renewable energy law and for the first time set targets to double the proportion of renewable in the total energy consumption mix from about 7 percent to 15 percent by 2020," she said.

China became the world's biggest investor in clean energy in 2008, with about 34.6 billion U.S. dollars, which was considerably more than the largest developed country, according to Lok-Dessallien.

"China is now a world leader in renewable energy manufacture with 40 percent of the global market share of solar panels in 2009, 30 percent of the world's wind turbines and 77 percent of the world's solar hot water collectors," she added.

Martin Khor, executive director of South Center, an intergovernmental policy think tank of developing countries, also spoke positively of China's achievements in green energy development.

"I attended a very important and interesting side event in Tianjin on the way that wind energy has been promoted. Laws (in China) have been changed so that wind energy can be part of the national grid. And solar energy is trying to find its way into that equation," he said.

In recent years, China has actively optimized its energy mix and made great efforts to develop low carbon energy such as renewable and nuclear energy.