Global Syn Turf has the most informative artificial website I have found to date.  I have done extensive research to find the most reputable artificial turf manufacturers that I could buy from.  Their website is so informative and educational.  I found a section called Questions and Answers from consumers that have questions about artificial turf.  I recommend to everyone that wants to learn about artificial turf get on globalsynturf.com and educate yourself and order some free samples.