The greenhouse gas is probably produced when XPS foam is made, and/or when the materials used to make it are processed. In other words, making a car (refining the steel and making the plastic, etc.) all produce carbon dioxide, and finding and producing the oil to make the gasoline puts carbon dioxide into the air -- as well as burning the gasoline in our cars producing carbon dioxide.
While all insulation materials help us save energy, they each take some energy to make from raw materials into insulation. Some like XPS produce more during manufacture than others.
|