It may not be news, but now it's scientifically documented: when we export manufacturing to China and import the resulting goods back here, the net result is to increase greenhouse gas emissions. See the June 2007 paper by Carnegie Mellon University engineers Christopher L. Weber and Scott H. Matthews, published in the journal Environmental Science and Technology. Here's a link to a press release about the paper: http://www.eurekalert.org/pub_releases/2007-06/cmu-cmr061407.php.
This phenomenon is likely to accelerate as less-than-global cap-and-trade schemes are enacted.
--Brian