Bamboo is sustainable for several reasons. Bamboo is easy to grow and grows quickly, capturing Carbon like no other woody plant. Pesticides and complex fertilizers are not necessary. Bamboo self-regenerates from its roots, which can thrive in even the most shallow, rocky soil.
3D Printing uses PLA which is made from renewable resources such as corn starch, tapioca roots or sugar cane, unlike other industrial materials made primarily from petroleum.