Composting toilets are eco-friendly sanitation systems that convert human waste into compost through natural decomposition. They use little to no water, making them ideal for areas with limited water supply. These toilets typically have a separate chamber for solid waste, where it is mixed with carbon-rich materials like sawdust or peat to promote aerobic breakdown. The composting process can take several months, resulting in nutrient-rich compost that can be safely used in gardens, provided it is properly managed. Composting toilets are popular in off-grid living, camping, and environmentally conscious homes, offering a sustainable alternative to traditional flush toilets.