Journalist Mark Lynas was "in the room," as he puts it, as President Barack Obama wrangled with the most powerful leaders in the world in the waning moments of the Copenhagen talks. Lynas says China is at fault for scuttling the deal: 
To those who would blame Obama and rich countries in general, know this: it was China's representative who insisted that industrialised country targets, previously agreed as an 80% cut by 2050, be taken out of the deal. "Why can't we even mention our own targets?" demanded a furious Angela Merkel. Australia's prime minister, Kevin Rudd, was annoyed enough to bang his microphone. Brazil's representative too pointed out the illogicality of China's position. Why should rich countries not announce even this unilateral cut? The Chinese delegate said no, and I watched, aghast, as Merkel threw up her hands in despair and conceded the point. Now we know why – because China bet, correctly, that Obama would get the blame for the Copenhagen accord's lack of ambition.
China, backed at times by India, then proceeded to take out all the numbers that mattered.