Joy Posted: 8/9/2011 12:14pm PDT Toxic chemicals should be tested on ALL car seats BEFORE hitting the shelves! suzannekane Posted: 8/10/2011 12:10pm PDT Joy, excellent idea. That's why consumers should let car seat manufacturers know their thoughts. It does make a difference, as Ecology Center's Jeff Gearhart said. Car seats have improved in this area over the past few years, due to consumer opinion as well as the results of testing.