China's Air

The major cities in China have air so dirty that you can't even jog outside for a long period of time. In a growing economy, trucks are necessary to the efficiency and logistics of moving goods around the country. China is no exception to this, however, their trucks burn diesel fuel that is 130 times more contaminated than what is allowed in the U.S. China wants to cap pollution but keep the economy going at the same time.

http://www.nytimes.com/2007/12/08/world/asia/08trucks.html?_r=1&ref=asia&oref=slogin