We are expanding the scope and capabilities of living materials, especially their catalytic behaviors, mechanical stiffness, and degradability to be practically useful for sustainable environments. Because bacterial spores can survive harsh conditions, such as dehydration, nutrient-limitation, organic solvents, and oxidative stress, spore-containing composite materials could be produced in dry form. So far, living materials have been made primarily in hydrogel forms (~kPa) because living cells typically require water and nutrient to perform and maintain their functions. The expected outcome of these efforts is a set of design principles to produce robust living materials useful for practical applications and contribute to a sustainable environment.