Guardian: The “c word” entered the vocabulary of a Chinese president for the first time today, as Hu Jintao promised his country would set its first carbon target for 2020. Overall greenhouse gas emissions will not fall, but the fossil fuels burned in powering each surge of the economy will decline – a cut in so-called carbon intensity. For the moment, it is a breakthrough of terminology more than substance. But in promising such a goal, Hu has effectively declared that China – the world’s …