Based on our previous blog post, “It’s Easy Being Green with Tefzel® ETFE: 8 Green Properties,” it is evident that Tefzel ETFE film is the best choice for a greenhouse covering. No other material comes as close to the Tefzel ETFE film in creating a sound greenhouse effect. Before we delve into the advantages of using Tefzel ETFE film in building a greenhouse, it is important to know about the greenhouse effect. We’re not talking about on a global scale, but in an actual greenhouse.