Waste products are materials that are no longer useful and are discarded by living organisms or human activities. In nature, animals produce waste through processes like digestion, which can include feces and urine. Plants also generate waste, such as fallen leaves and dead cells. In human contexts, waste products can come from various sources, including households, industries, and agriculture. Common examples include plastic packaging, food scraps, and chemical byproducts. Proper management of these waste products is essential to minimize environmental impact and promote sustainability, often involving recycling and waste treatment methods.