An ozone generator may damage some types of plastics if it is used in an enclosed area. It produces a high concentration of ozone, which can cause air pollution and damage to certain materials. It is possible that the ozone can break down certain chemicals in the plastic over time, weakening it and causing it to become brittle or discolored. For safety reasons, it is important to keep the ozone generator away from any sensitive plastic surfaces or products, as well as from people or other living things.