Won’t the straw decompose?
Organic material requires both oxygen and water in order to decompose. With proper construction techniques, water will not enter the building thus making decomposition impossible. Rice straw, in particular, has a high silica content which increases its resistance to decay. Straw has been used as an insulating material for many centuries, and has even been found in excellent condition in Egyptian tombs thousands of years old. Straw will not decompose as long as its moisture content is kept low.