The article discusses how water, soil, and grass evaporate naturally. It combines two theories to estimate evaporation rates using weather data. Experimental results show that the energy-based theory is more accurate than the aerodynamic one for open water evaporation. Evaporation rates from soil and grass are fractions of those from water, with grass evaporation changing with daylight length. The findings match well with data from different locations, showing that the theories can be applied to estimate evaporation rates in various regions.