The United Nations recently hosted a special summit on climate change, designed to build consensus among nearly 100 world leaders before the Copenhagen climate conference this December. The meeting concluded without the leaders agreeing to any binding GHG emissions reduction targets or any strategy to help developing countries finance investments in low carbon technology. However, in an address to the summit, U.S. President Barack Obama said his administration is “determined” to act on climate change. Perhaps more important, Chinese President Hu Jintao announced that his country will aim to reduce its carbon intensity – in terms of CO2 emissions per unit of gross domestic product – by a “notable margin” below 2005 levels by 2020. Although China had previously proposed reducing the intensity of its energy use, the September Summit marked the first time it had proposed reducing the intensity of its CO2 emissions. For further information, please see the 2009 Summit’s homepage.