Compostables are materials that can break down naturally and return nutrients to the soil. They include items like food scraps, yard waste, and certain types of packaging made from organic materials. When composted properly, these items decompose into rich soil, which can be used to support plant growth. Unlike traditional waste, compostables help reduce landfill use and lower greenhouse gas emissions. Many cities have started composting programs to encourage recycling of organic waste. It's important to check labels for biodegradable or compostable certifications to ensure that products will break down effectively in a composting environment.