You have a good point with all the rhetoric flying around. Chemically speaking- a "polymer" is merely a repetitive unit of the same molecular structure comprising a large molecule. Their chemical stability is both a blessing and a curse-environmentally speaking. The word "polymer" has been overused in so many popular products that its' intended meaning has been blurred. I think it is generally viewed as our scientific progress in making things lighter and more resilient. I'd still opt to clean the soot from my tailpipe off my boat and start on the favored side of the line.