... , organic, and environmentally friendly. 3. It is made of rice husk, rice stalks, wheat straw, corn stalks, ... renewable bio-resource. It is a kind of new green material and can be biodegraded after use in ... , organic, and environmentally friendly. 3. It is made of rice husk, rice stalks, wheat straw, corn stalks, ... renewable bio-resource. It is a kind of new green material and can be biodegraded after use ...