China goes retro.

In Beijing alone, nearly 1,000 new vehicles hit the road each day, and several Chinese metropolises (including Beijing) are among the world's most polluted cities. Now a U.S.-Chinese partnership aims to turn the tide. In November 2004 the U.S. EPA, China's State Environmental Protection Administration, the Beijing Environmental Protection Bureau, and other groups began a demonstration plan to retrofit an existing Chinese fleet of buses and trucks with clean diesel technology. The EPA has pledged $250,000 and a significant number of man-hours to the effort. Emissions from older diesel vehicles pose serious health problems and contribute to acid rain and ozone formation. Retrofitting should reduce emissions in the test diesel fleet by 40% or more.