Many many things about prefabricated buildings
Amounting to about sixty tons per year, more metal is recycled than aluminum, paper, glass and plastic combined! To give a better picture of the environmental benefits, consider that you are able to build a 2,000 square foot home out of metal from six recycled cars. With wood, you would need to cut down forty to fifty trees to build a dwelling of comparable size with wood! Metal buildings get very high marks for human physical health and safety, too. First of all, metal is less likely to mold or attract mildew like organic building materials. Due to the fact that metals can be galvanized, they will not rust. Both of the aforementioned aspects lend themselves to better air quality within metal buildings, superior to what you will find in most wood buildings.