$HPMM is constantly looking for new, eco-friendly building materials that will last longer than the concrete, steel, and wood options of today. According to the U.S. Department of Energy, the average office building lifespan in 2008 was 73-years. With HempCrete, these same buildings will now come with a 400 to 500-year lifespan. https://finance.yahoo.com/news/hemp-naturals-...00304.html