Mr. Bobruk, in his June 13 letter, made the statement “Plastics are a product of an oil-and-natural-gas industrial age that is dying.” While it is true that most plastics are currently based on such feedstocks, not all plastics are.
Polylactic acid is a well-noted commercial exception and other plastics that are not based on petroleum feedstocks are also being prepared. We can continue to debate exactly how much oil reserves exist — a debate that has been going on for at least the 40-plus years that I've been alive and is no closer to being resolved — but there is no debate on this: Plastics are here to stay.
Aspen Research Corp.
St. Paul, Minn.