Chess in China 1998. Karpov's second visit took him to Beijing, Shenyang, Shanghai and Guangzhou – four of the five largest cities in China. He also took the opportunity to launch the Chinese edition of his book "Disney's Guide to Chess" and appeared to autograph his books at major bookstores in each city he visited. There were 20,000 copies for the first printing and more than half were sold within one week of his visit. Karpov played a total of five exhibitions and once again, the immense publicity raised the interest of chess to another level. At present, in terms of media publicity,
Climate change in the United States produced 6,930 mt (15.7% of the world's total). In the cumulative emissions between 1850 and 2007, the U.S. was at the top in terms of all world nations, involved with 28.8% of the world's total. China's emissions have outpaced the U.S. in CO2 from 2006 onward. The U.S. produced 5.8 billion metric tons of CO2 in 2006, compared to the 6.23 billion coming from China. Per capita emission figures of China are about one quarter of those of the U.S. population. The single largest source of greenhouse gas emissions in the U.S. is power generation. For example, data from 2012