Building a marina down river from a beaver dam demonstrates which principle of green engineering? consider the entire lifetime of a design
conserve natural resources
communicate with neighboring communities
maintain and improve the surrounding ecosystem

Plot schematically the tensile stress versus strain curves for a typical thermoplastic material at a temperature below its glass transition temperature (tg and at a temperature above its tg, respectively. do the same for a typical thermosetting material. list in a table any differences or similarities between the two materials at t> tg and t < tg, respectively, and relate them to the structures of the two types of polymers