The term "safety addition" refers to a substance or measure that is added to something in order to improve safety. This could be an additional component, feature, or precaution that helps prevent accidents, injuries, or other negative outcomes. For example, adding flame retardant chemicals to materials like clothing or furniture can increase their safety by reducing the risk of fire spreading quickly through these items. Similarly, installing guardrails on a construction site can improve worker safety by providing an additional layer of protection against falls from heights. In summary, "safety additions" refer to any enhancements made to something in order to make it safer or reduce the risk of accidents and injuries.