Green Treated Lumber

I recently received an inquiry involving a viewer's concern over a home improvement show that built a children's play area/retaining wall using green treated lumber. The question was "what potential health hazards are there in using green treated lumber?"

While I am not an expert on this by any means, I found these links very helpful (provided to me by colleague Dr. Jim Bowyer). I hope they help.

What's In That Pressure Treated Wood?

CCA-Treated Wood for Residential Use

Chromated Copper Arsenate (CCA): Questions & Answers: What You Need to Know About Wood Pressure Treated with Chromated Copper Arsenate (CCA)