"Clean" refers to the state of being free from dirt, stains, or impurities. It can apply to various contexts, such as personal hygiene, household cleanliness, or environmental conditions. Maintaining cleanliness is important for health and well-being, as it helps prevent the spread of germs and diseases. In a broader sense, "clean" can also describe processes or products that are environmentally friendly. For example, clean energy sources like solar and wind power produce little to no pollution. Additionally, cleaning products that are biodegradable and non-toxic contribute to a healthier planet by reducing harmful chemical waste.