Concentration of CO2 in the Atmosphere

Letter to the Editor

Comment on “Tips to Reduce Your Carbon Footprint Every Day” in the January 2020 issue of G.E.T.

Having helped operate a “foam” cup industrial process back in the 70’s and using true Styrofoam as a building product in the 80’s, I learned the difference between the two.

The following is from Wikipedia:

“Styrofoam is a trademarked brand of closed-cell extruded polystyrene foam (XPS), commonly called “Blue Board,” manufactured as foam continuous building insulation board used in walls, roofs, and foundations as thermal insulation and water barrier. This material is light blue in color and is owned and manufactured by The Dow Chemical Company.

In the United States and Canada, the colloquial use of the word styrofoam refers to another material that is usually white in color and made of expanded (not extruded) polystyrene foam (EPS). It is often used in food containers, coffee cups, and as cushioning material in packaging. The trademarked term is used generically although it is a different material from the extruded polystyrene used for Styrofoam insulation.”

Styrofoam is a very helpful building product while expanded foam materials such as that used for cup, packaging, and the like are anything but helpful.

Sent in from Russ Lanoie, Conway, NH. Contact: Website:

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