A scene of blue skies over the Temple of Heaven is seen on an electronic billboard through pollution in Beijing on November 27, 2015. China is the world's largest polluter and will be a key player at next week's climate change talks in Paris in the face of disputes over whether developed or developing countries should bear more of the burden for reducing emissions.
A scene of blue skies over the Temple of Heaven is seen on an electronic billboard through pollution in Beijing on November 27, 2015. China is the world's largest polluter and will be a key player at next week's climate change talks in Paris in the face of disputes over whether developed or developing countries should bear more of the burden for reducing emissions. GREG BAKER AFP/Getty Images
A scene of blue skies over the Temple of Heaven is seen on an electronic billboard through pollution in Beijing on November 27, 2015. China is the world's largest polluter and will be a key player at next week's climate change talks in Paris in the face of disputes over whether developed or developing countries should bear more of the burden for reducing emissions. GREG BAKER AFP/Getty Images

UN climate change summit could bring first progress in years

November 28, 2015 5:20 PM