Natural mushrooms can function as high-efficiency solar evaporators, using sunlight to convert contaminated water into clean vapor. In lab conditions (about four times normal sunlight), they achieved evaporation rates of ~1.0 lb/ft²/hour for sewage and ~0.76 lb/ft²/hour for seawater. Under real outdoor sunlight (about half normal intensity), rates remained high at ~0.53 lb/ft²/hour for sewage and ~0.43 lb/ft²/hour for seawater. The mushroom structures were durable, resisted salt buildup, and outperformed many synthetic materials.