Urbanization in China some cases to an ethnic stratification of labor and greater potential for ethnic conflict. In 2005, China had 286 cities. Most of China's cities have a population of one million and below. Shanghai is the largest city in China, with a population of 19 million, followed by Beijing with a population of 17.4 million. These are the two mega-cities in China. From 2010 to 2025, it is estimated by the Ministry of Housing and Urban-Rural Development that 300 million Chinese now living in rural areas will move into cities. The fast pace of urbanization will create at least one trillion
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