Environment Health: As Gov. Jerry Brown tours some of China's economic hubs this week, he is breathing the kind of heavy, soiled air that blanketed Los Angeles decades ago.
The soot and smog that are byproducts of this country's industrial progress are choking its people and threatening its economy. Chinese leaders are talking openly about the need to clean up the air, and to learn how from California.
So Brown and a large delegation of business and political leaders have come to lend a hand, as well as to leverage...