New fuel economy standards sued as too weak

Some environmental groups have said the new standards are a small step in the right direction, but the Center for Biological Diversity said Thursday they're actually weaker than the requirements that the Bush administration proposed last year for 2011 vehicles.  http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2009/04/02/MND416RSUG.DTL