Report on waterway shipping decline fuels Asian carp debate

A federal report showing that cargo traffic on Chicago-area waterways has been flat or declining for 15 years was embraced by those who support closing locks or installing barriers to keep invasive species out of the Great Lakes.

http://www.chicagotribune.com/news/local/ct-met-chicago-locks-study-1208-20111208,0,7546902.story