Decomposers break down wastes and the remains of other organisms. Decomposers grow wherever there’s food and moisture. One way to stop decomposers from spoiling food is to freeze it at very low temperatures. Food pickled in vinegar kills decomposers. When you boil and seal food in cans, no new decomposers can enter. Decomposers can’t survive in salty water. Another way to stop decomposers from growing is to dry food. If decomposers begin to grow, they can reproduce to become billions.