Yes. Metal is great for the environment. Most metal coils used for roofing contain at least 25% recycled material. According to the National Association of Homebuilders Research Center, 20 billion pounds of asphalt shingles are dumped in U.S. landfills every year. Most metal roofs can be installed over the current roof without tearing off and contributing to landfills. The metal used for roofing is clean, and 100% recyclable.