This document discusses green building materials and their benefits. It begins by outlining the environmental issues caused by conventional construction materials and the need for more sustainable options. It then examines various green building materials like bamboo, straw bales, ferrock and hempcrete that can reduce carbon footprint and energy usage. These materials are natural, renewable and require less processing than traditional concrete and steel. The document concludes that green building materials not only lower construction costs but also help create stronger, healthier structures while protecting the environment.