As New York Times (24 September 2009) describes the United Nations Climate Change Summit in New York, both China and the United States produce 40 percent of the global greenhouse gas emissions. In the climate summit, the world needs the leadership from China and the US. Hu Jintao, China’s President, offers that China would reduce its carbon intensity – the amount of CO2 it emits for each dollar to economic output. China will plant to increase trees about 1,300,000,000 square meter by 2020, compare with 2005 level. The size of the area where the trees will be planted is several times the size of Taiwan. Hu’s statement is more specific, but President Obama’s speech lacks specific targets. Unfortunately, Obama could not change his speech because he made his presentation before the Chinese President.